20 years ago it was $5 and maybe like 10% of skills were locked behind it. I noticed very little impact from it. But I’m pretty sure end game stuff was locked. IIRC, dragon armor was locked and may have been the best armor.
I’d be surprised if that general model changed significantly.
As someone who buys expensive games, games I’m excited for, or just franchises I’m invested in, the death of discs is going to really make me reevaluate my gaming. I’ll probably at least wait for a sale for every single game if I can’t have a physical copy.
Almost all of my digital purchases are cheap games.