Breaking Up With VMware: We're Finally Leaving, but at What Cost?

The first week feels like controlled chaos

There's something oddly honest about week one of a migration. There's no polished case study or vendor-approved success story, just a running list of things that worked, things that broke, and things nobody warned you about. One engineer laid it out plainly: they're moving off VMware toward HPE's Morpheus and VM Essentials, and it's "moving in the right direction."

That optimism matters, but friction tempers it. Networking prep helped, yet a missed MTU setting on iSCSI ports slowed everything down. It's the kind of mistake that never shows up in slide decks and absolutely shows up at 2 a.m. during deployment. Strategy is only part of a migration; the rest is a thousand tiny details waiting to trip you.

The illusion of "simpler" alternatives

On paper, switching platforms often looks like a simplification. In practice it's more like trading one kind of complexity for another. The move to KVM at the hypervisor level brought a subtle shift toward less abstraction and more direct interaction.

"There is still some Linux and command line involved," the engineer noted, almost casually.

For some people that's empowering, and for others it's a step backward. One voice online shrugged it off with "Anything will do for non-critical," suggesting that maybe not every workload needs enterprise polish.

That's the tension. VMware built its reputation on hiding complexity, and when you leave, you start seeing it again. Whether that's a feature or a flaw depends on who's looking.

Compatibility landmines at the edges

The real surprises come from the edges more than from the core platform. TPM support, for example, turned into an unexpected wrinkle. VMware offers vTPM, and the new environment doesn't, at least not in the same way.

"It's not a show stopper," the engineer said, but it's still a reminder that every VM has a story and not all of them translate cleanly.

Others pushed back harder. One comment warned that ignoring TPM in a Windows-heavy environment is shortsighted as well as risky: "It will not be long before it's required."

A third perspective was more pragmatic: prioritize what matters, test critical systems first, and worry about the rest later. It's not perfect, but migrations rarely are.

Encryption: philosophy meets reality

If TPM is a technical hurdle, encryption is a philosophical one. VMware handles VM-level encryption, while the new stack leans on storage-level encryption instead. That sounds reasonable until you hit a wall, because you can't migrate encrypted VMs directly.

Suddenly what felt like a design choice becomes a migration blocker. Some engineers agree with the storage-first approach and ask why you'd encrypt twice. Others see it as a limitation, especially in environments with strict security policies.

Then there's the practical angle. One commenter pointed out that VM-level encryption can actually hurt performance by breaking deduplication and compression. Another countered with examples of advanced VMware storage integrations that dramatically reduce I/O overhead. The same problem produced three different conclusions, which is how infrastructure debates usually go.

The "did you even test this?" moment

No migration story is complete without some second-guessing, and here it came fast.

"Did you not PoC it?" one commenter asked bluntly.

It's a fair question, and a slightly harsh one. Proof-of-concept testing is supposed to catch issues like missing TPM support or encryption limitations, but in practice not everything makes the priority list. The engineer admitted as much: some systems were deprioritized, some were outdated, and others simply didn't seem critical at the time.

Migrations are full of trade-offs. You can't test everything equally, and sometimes you only discover the gaps when you're already mid-move.

Not everyone thinks this is rational

While some see a thoughtful transition, others see emotion.

"These are emotional decisions," one commenter argued, suggesting the move might be more reaction than strategy.

It's a harsh take, but it points to a wider divide. For some teams, leaving VMware feels overdue, a response to pricing, licensing changes, or shifting priorities. For others it looks like abandoning a mature ecosystem for something less proven. In the middle are people who aren't convinced either way but are watching closely, taking notes, and waiting to see how these early migrations play out.

The steady momentum of leaving

What stands out most is the tone more than the technical details. The exit is measured, cautious, and iterative rather than dramatic.

"We'll post more as we progress," the engineer wrote.

That's how these shifts really happen, through incremental updates, shared lessons, and a growing sense that staying might be harder than leaving, instead of a big announcement. Other voices chimed in with their own experiences on different platforms with similar challenges: mapping dependencies early, testing backups, and watching for networking pitfalls. The details change, but the pattern stays the same.

Leaving VMware is a process more than a single decision, and for a lot of teams right now, that process has just begun.