It's pretty obviously a failed experiment. Why keep repeating it? Try again in another 3 months.
The answer is probably that the Copilot team is using the rest of the engineering organization as testers. Great for the Copilot team, frustrating for everyone else.
Do you honestly not see a problem with those two statements in such close proximity? Is it finished or is it released? The former is supposed to be a prerequisite for the latter.
I wouldn't necessarily call that just an experiment if the same requests aren't being fixed without copilot and the ai changes could get merged.
I would say the copilot system isn't really there yet for these kinds of changes, you don't have to run experiments on a language framework to figure that out.