What comeback? It’s been there for years and people who have use for them use them (or use git-clone(1) if they are not aware of them). It didn’t fall out of use at any point.
"Comeback" is probably the wrong word, maybe "uptick" in usage?
Worktrees just fit particularly well for the scenario of developing multiple different features in parallel on the same codebase, which is a pattern that devs doing a lot of AI assisted development have.
