> And also, yes, I expect a 5 year old operating system to still work. Windows 10 does and it came out in 2015. but the windows 10 you run in 2021 is super dif

> And also, yes, I expect a 5 year old operating system to still work. Windows 10 does and it came out in 2015. but the windows 10 you run in 2021 is super different from the windows 10 you installed in 2015, there are ton of (sometimes fairly breaking) updates : https://en.wikipedia.org/wiki/Windows_10_version_history https://en.wikipedia.org/wiki/Windows_10_version_history running an up-to-date win10 is basically equivalent to updating to every ubuntu release, LTS or not. Kernel is different, libc is different, system APIs implementations are different, everything is updated every few months - even the start menu pretty much changes all the time.