Not sure about Twitter internals, but doing a Twitter clone is one of the most popular Ruby on Rails noob exercise.
Anybody can make a twitter that can handle 100 users. The challenge is making worth at the scale of twitter
Sure, but the “scale of Twitter” becomes a more and more accessible goal by the day. elon fires everyone and intentionally breaks everything while only new feature releases are “new and exciting” paid tiers of horseshit that nobody wants. I’m not paying a penny for the privilege to yell into his sad, shrinking room with the remaining 17 nazis, 4200 corporate brands and 1.75 million bots that are left to make up its userbase.
Ah yeah, probably because Twitter was originally written in Ruby on Rails and it’s always nice to do exercises that feel like something real. But yeah, making things actually scale is pretty difficult and they felt they had to move from RoR to something else (Scala in this instance).
Of course, Elon Musk probably fired everyone responsible for making it scale properly, so at this point, stopping the growth of Twitter is probably good, because otherwise it might run into issues again.
