They care, they have to to make money. Take any supposed new metric pushed by Elon with a big grain of salt especially something completely unmeasurable like "unregretted user minutes" that's supposed to be their new guiding light.
Are they counting all the minutes we spend talking about this regrettable dumpster fire against the net number?
Given it's a completely impossible to measure metric I'm betting it's going to always be improving no matter what's happening on the platform to please the new ownership.