I've gone back and forth a few times on digital vs Blu-ray disc. A few things keep me from going all-in on digital:
Movies Anywhere isn't officially in Canada, but of course you can signup from behind a VPN so we've still taken advantage to some degree (iTunes is the main limitation as they need your Apple account to be U.S., too). So I can use it now, but it's still a hard sell to commit a lot of money to a platform that may turn around, block me out, and wipe out my licenses.
Discs are still higher quality and often come with more bonus features. That's not always a factor if I'm just going to watch something once or twice, but most of the time if I'm buying I care more about that stuff.
I can rip discs and use on Plex, which is a more pleasant interface than any of the MA streaming services and available on all my devices and includes TV and includes studios which haven't signed on to MA yet.
Related to the first point, I actually own the disc. I'm not at the whim of a licensing agreement running out or (unlikely) a company shutting down the service.
Digital is not any cheaper most of the time, aside from more sale options to watch for. If I could get digital for significantly less, yeah, that would probably swing the calculus in a hurry, but it's usually not.
Movies Anywhere is still not completely reliable. Some movies don't sync that I am pretty sure should (the studio is a part of the program). Other movies might give me an extended version and a theatrical version on the platform I bought it, but only the theatrical syncs. I think about 70% of my movies synced, which is far better than not having the service at all, but is more than enough leftover that I am always left second-guessing: will this one work?
For now I'll keep buying disc+digital combos, putting the digital into Google Play and maybe it works to MA from there, maybe not, but at least I've got the disc to use otherwise.