I wouldn't call that notably "heavy" tweeting...
But even still, the number of people I know that Post more than 4 times a week surely outnumber those who don't. By quite a lot, too.
Reasons:
- increasingly irrelevant content. Most of my feed is garbage from people I don't follow, or want to
- trash UX. Way too many distractions, sidebars, notifications, etc.
- pervasive toxicity
If Musk gets them, they'll probably be 4chan within a year, and I doubt they'll have much of a future from there.
It's sad. They were, at one point, a good community.
I wouldn't call that notably "heavy" tweeting...