True. Your comment prompted me to take a trip down memory land and look at the accounts I followed. A few are still at it, but the vast majority of them stop posting around 2016, which matches my recollection of the timeframe when most everyone stopped thinking about Twitter.
However, that doesn't answer why a company that wasn't what it used to be still needed so many people for so long.
It's gone up in the ranking of most-visited websites [1]. I'm not even a Twitter/X user but that's a far cry from what the pundits were saying was inevitable.