Saw someone else here or another thread about this make a great point: It's not the digital nature of the thing, it's where and who is storing it. Steam used to have a way of backing up installs yourself; if it's still a thing, I have no idea where it's hidden now. GOG is the only place I know that still allows this, with their DRM free installer executables.

I don't necessarily need to buy the games on a disk, but I sure would like the ability to archive them myself in the event the business storing my shit goes under or randomly decides to no longer store my shit. That was my biggest concern with Steam back when it launched (i resisted moving to the platform until the very last hour of WON being shut down and Steam became the ONLY way to play CS), but, again, it used to let you do this hella easily.