As a user, you're to be no longer trusted with such a thing as full and unconditional access to the device you bought. Browsers are headed the same way. And a large crowd here on HN is okay with this, because "security."
This has been true for a while, but the OP isn't even about full and unconditional access (like root access, which is all but impossible for normal use), it's literally just "sync my files".
I was under the impression browsers have been implementing more hardware access, not less, if slowly. What are you referring to?
Yeah, exactly, it's a really worrying trend and one that I really don't want to see continue.