It's only been three days since the API change. Give it a month and we might have a bit of usable data, but for precise information, we'll need to wait a few months or even up to a year.
It actually hasn't. The api hasn't been changed. Reddit is such a shit show they didn't make their own deadline. Apps that didn't take themselves down in advance still work.
For RIF, the first day I was getting the 429 error. Then it was showing old.r.com. After a couple days, rif loaded like it normally would pre shutdown. I was just logged out and Im not logging back in. I havnt noticed any issues. NSFW items still load.