[gabelschlager]

Is it really that much of a problem though? I own PC games that are close to 25 years old at this point and have problems installing and playing them on the PC I build two years ago. I have hard drives and USB sticks that are from 2005 and still work fine (though obviously, all their data is backed up onto newer devices). CD-ROMs can still be easily bought and played.

As long as OP sticks to traditional and established formats and pays attention every 5-10 years to migrate their data onto their new PCs, etc. it shouldn't be that much of a problem.