No, or at least not initially. With Apple's track record with online services I wouldn't trust them to not mess this up. I'd stay with BackBlaze for the time being and let others be the early adopters.
While I agree that their track record 5-10 years ago was poor with multiple false starts around iCloud/Me.com. I do think they have absolutely nailed their online services now, iCloud is brilliant and does everything that the market it’s targeted at wants (maybe except versioned backup).
And encryption.