MicroVMs Might Kill Your Containers, and That's Why People Care
A small arrival that feels bigger than it looks
Every now and then, a small side project drops into the ecosystem without screaming for attention and still manages to shift how people think. That's what's happening here. A lightweight integration that lets OCI-based microVMs run inside Proxmox isn't trying to replace anything outright. It just sits there, offering a different path.
At first glance, it looks like a niche experiment aimed at tiny hosts, low-resource environments, and container-like workloads. The reaction tells a different story, though. "That looks sick, I'm gonna try it," one person said almost immediately, and that kind of casual curiosity is often how bigger shifts begin.
The container vs VM debate isn't going away
There's an old tension in homelabs and beyond between containers and virtual machines. Containers are fast, efficient, and flexible. VMs are isolated, predictable, and safer. People have been bending the rules for years, running Docker inside LXC even when they probably shouldn't.
One comment cuts straight through that compromise: "They say you shouldn't run Docker in an LXC… but many of us do." That line reads almost like a confession. Everyone knows the trade-offs, but convenience wins.
MicroVMs step right into that gap. The pitch is simple: what if you could get VM-level isolation without paying the full VM tax? Suddenly the messy middle ground of Docker-in-LXC starts to look less like a clever hack and more like a temporary workaround.
The promise: isolation without the overhead
Novelty is part of the pull, but efficiency with a purpose matters more. One user framed it well: this could be "what a huge portion of VM instances need… I just need the isolation."
Most workloads don't need full-blown virtual machines emulating hardware down to NVMe drives or USB passthrough. They need a clean boundary, something safer than containers and lighter than traditional VMs.
MicroVMs aim for that balance. If they hit it, they compete with containers and complicate the entire decision tree as well. The choice becomes containers vs microVMs vs VMs, and that middle option looks very appealing.
The skepticism is still there
Not everyone is ready to jump in headfirst. There's excitement, but it's cautious. You can hear it in the way people talk about "trying it in the lab" instead of deploying it seriously, and no one's calling it production-ready yet.
There are also practical gaps. Some workloads still need features microVMs don't fully cover, like hardware passthrough, more complex device simulation, and edge cases that traditional VMs handle without blinking. One user pointed out needing NVMe simulation or USB passthrough in certain scenarios. Limitations like that are significant, and they keep microVMs from replacing VMs outright.
Then there's the ecosystem question: tools, integrations, and long-term support. A clever project can spark interest, but turning it into something people rely on daily is a different challenge entirely.
Why this feels like the beginning of something
Even with the caveats, something is shifting. People are reacting to an idea that feels overdue as much as to the tool itself: lightweight isolation that doesn't force you into compromises.
The enthusiasm isn't loud, but it's consistent. "Love this," "can't wait to try it," "this is brilliant." It's the kind of feedback that doesn't overhype but keeps showing up anyway.
That's usually how these things evolve. There's no big bang, just a steady stream of people experimenting, tweaking, and gradually working it into their setups, first in labs, then in side projects, and eventually, if it holds up, somewhere more serious.
Whether microVMs end up replacing containers or VMs matters less than the fact that they're making people rethink why they chose either in the first place. Once that question starts circulating, the ecosystem doesn't stay the same for long.