If you use all these services, well… Personally, I'm running happily without iCloud, Siri, and with Spotlight reduced to a mere file search. Also, I dislike fea

If you use all these services, well… Personally, I'm running happily without iCloud, Siri, and with Spotlight reduced to a mere file search. Also, I dislike features like Camera Roll. The point being, you can still run macOS and probably wide portions of iOS (which I'm not using much) much like a legacy machine. However, if you're using cloud services (including third party services like Dropbox, etc, esp., if you're a non-US-resident), you're making yourself accessible. But this is by no way exclusive to Apple devices. (Arguably, more services run locally on Apple devices than on others – e.g., I don't think Google translate for images runs locally, requiring you to share both content and endpoint data – and there are more provisions for privacy in iCloud than in most of comparable third party services.)