This really sucks.

I can see why they may not want to support such a niche feature but on the other hand I can't help feeling the hostility of this move.

This happens all of the time. It usually comes back in a few hours. But it has been very unreliable for the last week or two.

Looks like it's back now.

A lot of people are doing this. Fandom (formerly wikia) has removed its RSS feeds as well.

Tried just now. It still works through rss.app route