I am afraid that despite all these options for containers, I still use my Vagrant scripts that build whole VMs based on my own schemes, use an apt package cache on the host and manage .ssh/config for me to make VSC remotes more seamless.

Almost all my stuff still runs on simple VMs because I cannot rely on my clients to take on more complex cloud infrastructure and I don't want to be stuck managing all of the things forever, so my life involves building customer VMs from build scripts that are adequately similar to my Vagrant boxes.

I use the VMs a lot for simple tests (e.g. of wordpress plugins and themes) so I have gone to the trouble of setting up Avahi with alias support, adding options for mailhog, different databases, different webserver setups I use for WP or Laravel or node.js, setting up an automated WP install etc.; so there are two or three starting configurations. I even had one for Magento before I realised I could be a lot happier without Magento in my life.

I guess it looks a fair bit like devcontainers now, and I should consider migrating over to that. But it's solid and under my control and that counts for a lot.