Hello. I am not the author of this software. I didn't even download it yet. I just found it and noticed that nobody on this subreddit mentioned it yet.
Here is the link to the github page of this project:
https://github.com/TagStudioDev/TagStudio
Here is the link to the video where the author explains how he wants it to work, his goals and the alternatives he found:
https://www.youtube.com/watch?v=wTQeMkYRMcw (there is also a second part of this, after he actually made the software public)
He has a nice voice (yes) and it seems like he just wants to make the best program possible that is useful for many different use cases.
By making this post I hope you will get inspired and go contribute to the project, maybe make some suggestions. It seems it will be a great one when its finished.
And I will come a few years later and enjoy it when its actually complete.
(Mods, if this breaks rule 6, thats like just your opinion man!!! Its open source!)