Reddit Is Fun (rif) was a well-designed app that just worked. It was fast, had a customisable user interface with defaults that didn't get in the way of enjoying the content, and could run on all of my devices easily, including an Android 7 phone from 2018. It's a shining examplar of what a mobile browsing app should be like.
By comparison, the official Reddit app feels somewhat slower, even on my relatively new Android 12 phone from 2021, having a very noticeable lag when scrolling through articles and comments. For video and photo posts, there's no way of browsing the comments without clicking on the thumbnail and having it auto-play the videos every time, meaning I need to react fast to pause the video (there is practically no way of stopping this). And it doesn't support Android 7 anymore, meaning the only way to access it from my 2018 phone is via the browser.
It baffles me why Reddit would want to cut support for 3rd party apps when they were a key component in the Reddit ecosystem.