>> It’s really nice to be able to run Windows 3.1 code on a Windows Server 2019 You can also run the same version of a newest app on Windows 7 and Windows 10.

>> It’s really nice to be able to run Windows 3.1 code on a Windows Server 2019 You can also run the same version of a newest app on Windows 7 and Windows 10. At least, you could back when 7 was still supported, and you probably still can, but I didn't check. Try installing a package targeting Ubuntu 21.04 on Ubuntu 20.04 LTS? :) (Replace Ubuntu with a distro of your choince in the previous sentence.) For all its flaws -- and it has many -- Windows is a platform while a Linux distro is a ball of tightly-coupled packages. >> I just want tools that immediately work. Totally agree with you here.