[xqcgrek2]

The tweet linked by the OP doesn't dispute Musk's assertion, nor state why Musk "doesn't understand GraphQL"

[bogantech]

Maybe it's supposed to be a sick burn that he said it was bad RPC calls when it's actually a bunch of bad GraphQL queries.

[cratermoon]

It's an opportunity lost, if you ask me. Programmers and SRE people from Twitter, SpaceX, and Tesla probably could have learned a great deal from each other, had there been any attempt to bring the cultures together diplomatically.