GitHub can’t focus on the basics like a stable platform. However, when they release stack commits a few weeks ago somebody had time to make the hamburger menu an unprofessional stack of pancakes…cute.
In my experience some teams move a lot faster than others and that leads to asymmetric quality. If all devs could pick up a new language and skillset overnigh then companies would have a lot more flexibility in their roadmaps, but humans don't scale that way - with or without AI.