What are you talking about? Twitter’s resiliency program is widely known to be one of the best in the world. They’ve been around so long that they’ve literally had to invent a lot of what we consider basic modern distributed computing from scratch. It will become a trash fire with everyone who maintained these massive systems gone, but don’t imply that they created bad systems, or failed at ‘just displaying text’, because they clearly haven’t.

It's far more likely that Elon consulted Twitter when they were having issues and just didn't take the credit. The distributed work of SpaceX and Tesla is far more important and hardened than what Twitter has achieved.

[citation required]

Parody, surely?

I would not underestimate the challenges they face operating on the scale they do. I would expect problems in databases, servers, message queues propagate pretty quickly all over the system. Then you need a specific expertise to locate and fix such problems.