Nothing against your Mac love but I get all the same features with Linux Mint on my $200 Lenovo. In the three years I've had it, it hasn't crashed a single time. And I've never lost any work of any kind. It also only updates when I tell it to update.
I have no idea if it can sync with an iPhone, iPad or Apple watch as I don't have any of those. My android phone and my Garmin watch sync to the cloud and yes, I can text from a browser. I actually have all those photos, messages and everything else available to any computer I log on to running any operating system out there. I also don't lose any data if I drop my laptop overboard while canoe camping.
Granted it's not very fast and the storage is extremely limited but I feel a whole lot safer knowing my data will survive pretty much any hardware disaster I might suffer. You won't lose stuff you keep in the cloud if your system crashes (or falls out of a boat, plane, or off the roof of your car).
So much good comes from open source. OSX itself is essentially Unix with Apple's engineering added on. It's very well polished but you do pay for that refinement and much of the same cool stuff is out there in the wild for anyone with the curiosity seek it out.
Just offering up an alternative that may not be quite as convenient but I believe is a more robust option.