Something that I've been thinking about a lot lately is my dependence on digital storefronts to access my PC library. Until a decade or so ago the majority of my PC purchases were on physical discs, and so I never had to worry about one day not being able to access them. ...
I was curious if anyone else had tried this before, and if so how it worked out for them. Alternatively how do YOU backup your games?
I'm very old-school in that I like to have local installation sources, and that's one of the reasons I have purchased so many titles through GoG and not Steam. Now in my case, I've not only been playing PC games for 30+ years, but have been making them professionally for 20+ years.
I've acquired many bookshelves full of boxed retails games, and to be honest, for most of them.. especially games after the mid/late 1990s, the physical packaging is not that interesting. So I've pared down my physical collection greatly, and moved the vast majority to digital. I keep the interesting stuff like the Ultima Series games, NOLF series, Early Blizzard games, some collector's editions and boxed copies of games I've programmed on.
But the rest? I've felt it liberating to move to digital and not be burdened by the physical packaging and media. Many of my earlier 1990s games came on 3.5" floppy disks, like the Ultima games, but if want to pull them out and play or examine (I actually do a fair amount of looking at old games as research for working on games in the same genre, etc), it so much easier (usually) to use the GOG installers from a hard drive (plus having DOS box for old games on current Windows). I also do some Mac development, so it's a bonus to get OSX versions.
So recommendation is: Put a big hard drive in your gaming PC. Download all the games to there. Then get an inexpensive external hard drive and periodically sync to it. I really like the 2.5" externals, which you can get up to 5TB in size now, as they don't have a separate power adapter.
As for burning the games to CD or DVD and making physical media? That takes even more time than money, and you still have the issue of CDR/DVD-R disks decaying with time. And as your library grows, so does the obligation if you feel the need to 'complete the set'. Instead, I would recommend this: Make a list of your all-time favorite games that have interesting packaging, manuals or other physical items, and go looking for them on eBay. Purchase the ones that are meaningful to you, put them on a display shelf - and when you go play them, get out the manual or other items and enjoy - like the spell books and cloth maps from the Ultima games.
Time is our scarcest asset. I have more games in my library than I will have time to play, so I pick and choose to get max enjoyment or usefulness out of them .