I know it's when, not if, that I let go of my HTPC and discs completely. I won't buy a disc now if there's no digital code. And I redeem all codes; no reason not to future proof since it's trivial and free.I can see a point coming in the not-too-distant future where I stop putting new stuff into my HTPC and simply use it to manage the legacy content that I already have. I’ve already decided I’m not doing 4K with it. My disc purchases these days tend to be for things not available anywhere else. And the HTPC is brilliant for managing TV show episodes compared to dragging out the discs. But in general, I don’t see myself buying discs forever just to buy more hard drives to rip them on to.
I'm ripping 4K, buying when affordable. My HTPC will do 4K. So that's not a stopper per se, for me. But TBD when I upgrade my household.