I've tried making do on Mastodon. It's just not as well-made. The federation thing gets in the way, the discoverability of content is hard, one prolific tooter can too easily flood your feed - it's a decade behind Twitter and Threads in terms of usability. Even the basic information density of the web layout is poor.

I'm willing to look past these flaws and stick with the fediverse, but if nobody I want to follow is doing that, there's no point.

I hope Gargron et al can make it happen and beat both Threads and Twitter, but so far they've just been too stubborn (like the search and quote-tweet things) and haven't iterated fast-enough to really compete.