alt Hacker NewsReally? I work across multiple vscode projects (locally), some use dev-containers and others don't. I have never noticed any difference in experience across the two.
I have also used them remotely (ssh and using tailscale) and noticed a little lag, but nothing really distracting.
Most likely a Windows or MacOS user, where docker runs in a linux VM. Optimized as much as possible and lightweight, but still a VM.