I totally understand, Vagrant and VirtualBox are quite a blast from the past for me as well. But besides the what-are-the-odds bug, it's been smooth sailing.

> VMs with 3D acceleration

I think we don't even need 3D acceleration since Vagrant is running the VMs headless anyways and just ssh-ing in.

> Incus (on Linux hosts)

That looks interesting, though from a quick search it doesn't seem to have a "Vagrantfile" equivalent (is that correct?), but I guess a good old shell script could replace that, even if imperative can be more annoying than declarative.

And since it seems to have a full-VM mode, docker would also work without exposing the host docker socket.

Thanks for the tip, it looks promising, I need to try it out!