Outside of the "saving my butt," like saving dozens/hundreds of hours of re-writing (probably by enforcing a backup copy of deployed code), I find git helps me gain time in numerous other ways:
1. git blame
2. git log (to re-assert where I left off, among other things)
3. git diff before a commit helping me to remember to remove test/debug code
4. github/gitlab etc search features occasionally
I wouldn't dream of going back to a non-git workflow.
PS: less/sass are cool. not necessarily time-savers but they make nice, clean css source.
Absolutely. I can't even imagine not using git, let alone version control. The time saved and improvement in process pays much more than you put in by learning it.
From side projects, to enterprise, to my own start up, Git has saved my butt more than once.