If you often find yourself renaming files I can highly recommend Flash Renamer. It's $20, but it must have saved me thousands of dollars in production time.
Btw, does anybody know of a modern disk usage manager that uses bright, clear individual colors like Space Monger?
PowerRename has worked fine for me, can also recommend it.
However, when there's directories and many, many files involved, I just use Python with pathlib. It's a couple lines of code anyone can learn to do, with all the flexibility of Python. PowerShell would maybe also be suitable.
Btw, does anybody know of a modern disk usage manager that uses bright, clear individual colors like Space Monger?