The day Apple announced this "feature," I backed up my stuff, turned off iCloud services on my phone, ordered a PinePhone, and installed Debian on my MacBook Pro. Like everyone else on this thread, I have nothing to hide, but that's not the point. The point is that the very existence of this program suggests that Apple has lost its way with user privacy. I don't trust any corporation, but I used to accept as plausible the proposition that Apple wasn't interested in user surveillance. Pretty naive, I guess.
OS X was great for many years, and it relieved me of the need to have a Linux machine around for getting stuff done. But this, along with the Big Sur phoning home issues, was the final straw. The walls of the garden just keep getting higher. Apple used to make great computers and a very good OS, but now they just provide an infrastructure for bs. I don't need what they're selling.
Anyway...so long, and thanks for all the credit cards/fitness videos/wearables/headphones/etc