Not sure if people missed this post on this community earlier, but RIF can be patched so that it works the same as before:
https://lemmy.dbzer0.com/post/307734
Sure, the question of should you still be using Reddit after their horrible treatment of 3rd party devs is up to you, just wanted to let people know this was an option.
After I tried it, seems to work perfectly. The only thing I noticed is that imgur links won't work anymore, probably because the api keys RIF was using to pull from imgur are not valid after the OAuth client patch. Small price to pay to be able to keep using RIF though.
EDIT: @talklittle, if you are not okay with people patching your app, I can take this post down
Readarr honestly feels like the most barebones of all the arrs. I tried it for a bit and decided to just use Calibre to manage my library.
Sure, I need to manually grab stuff but it more than makes up for that with the other features it has.