If only someone would "just" fucking build a viable replacement for Twitter. It's a weekend's work with the tools now available. C'mon. (pokes stick)
Those services are available, however, people would not stop using Twitter and will continue to do so until we stop consuming their content, then maybe they will finally get off Twitter...
Some of them would move to Instagram if it makes sense to do so, but Twitter apparently makes the best ad ROI figures among Twitter-like services.
Keep all the bullshit in one far corner, over there, in the distance, behind the big wall, topped with razor wire.
IOW, Twitter still is a social data infrastructure, like road or tap water. Something that the society depends on, that also ain't nobody paying for it, something that only makes sense at-cost max or at a loss.
I think that was always a fundamental problem with Twitter as a for-profit company. Surely it handles a large amounts of important communications, that are also not so exploitable or monetizable, ethically or not, just fundamentally.
As such, I find it easier and easier to just not visit. This is, however, entirely my own anecdotal.