Cut and paste is broken everywhere because of the number of apps that think they know better and "fix" it.

My bitterness is compounded by being on Linux, where this is probably even more encouraged in GUI apps then in other OSes. But I still have enough independent arguments with web sites, on my phone, and even in the context of the same application at times to have valid complaints just based on those.

Clipboards don't get an independent undo dimension because most users can't handle it. They're pretty full up on dimensions. Clipboard managers at an OS level are the better solution for those who can than another app "fixing" the problem in some unique way.