*and if Tumblr still allowed porn

While its true that Twitter helps to foster the worst modern scum of the internet and the worst trends, in the end, people like them will still exist regardless of social media.

If Twitter gets closed overnight, the people who use Twitter won't stop existing, they will move somewhere else, it's just like what happened to Tumblr, that place was a containment chamber, they destroyed it, and what was inside moved to Twitter.