Google's 2018 paper "Sim-to-Real: Learning Agile Locomotion for Quadruped Robots" by Jie Tan. Basically found that training in simulation and then transferring to real world works well for quadruped robots.
Aside from Grok, which is downright revolutionary, a lot of X remains completely stuck in the early days of Web 2.0. There's not even any parity between the desktop, iOS and Android apps in terms of features. That stuff is almost so basic that small startups can do it. Maybe X's