That's a UI problem with git making it hard to find hidden commits (pre-rebase). The commits aren't destroyed, they are hidden. The Jujutsu CLI is nice because it fixes this UI problem.
Not only that. Git doesn't appear to have any internal link between the hidden pre-rebase commits and the post-rebase commits, which hurts its ability to copy later commits across that rebase.
Yes, you're supposed to avoid moving later commits across a rebase... but the reason you're supposed to avoid that is because git is so bad at it.
