I would personally rate them lower than Apple’s services. Apple has built their brand on privacy of its users and our data so they have a lot to lose if there are serious breaches or public perception of that falls.
I think DCs (and iCloud) are fine for certain things, but I would not store data on them that requires the highest security if I could avoid it. But everyone is different - if you’re comfortable with your arrangement that’s what matters really.
Agree, and again we have to consider how secure we feel each scenario is to us. A friend who used to be head of security for one of the largest UK firms helped me with my home security so I am relatively confident of my set up here. Of course, if you’re dealing with big players (such as our own govts) they will more than likely get what they want regardless.
Agree: How do you secure your dev machine/environment - #2 by AstonJ (feel free to add more tips if you feel any are missing 
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