A vibrant ecosystem of full-featured 3rd party apps able to offer unique spin on the UX, tailored to different preferences of their user base who are willing to pay is a good thing. Not an indicator of a problem.
Now for Twitter/X we get One (1) ad-infested first party app requiring login/tracking, an unusably crippled logged out web view, and an API exposing a limited subset of data with a tiny free tier.
Is that really better than 10 years ago?