I've viewed twitter wayyyyy less (only when someone links something) since Tweetbot stopped working and I think it's been good for my mental health. A login wall will take that usage down to zero, so good news overall.
I find Twitter really annoying to use now, since they made it so all of the replies from blue checkmark accounts get boosted to the top of the feed. I have to scroll past all of them just to find "normal" comments. The BlueBlocker browser extension is helping, but it can only block 1 account approximately every 15 seconds, or it triggers a rate limit and I have to sign-in to Twitter again.
Yes it's enormous and popular now, but that's in spite of musks product vision.