karnak1: The emergence of steam and almost all games coming with steamworks from 2005 onwards forced me to stop buying games and resort to piracy whenever I wanted to play new stuff.
I only stopped pirating games when I discovered GOG and it's offline installers system.
And the worst thing for me back then, was I was buying discs and then couldn't play the game until Steam did an update, so with a 56k modem that could take a week in some cases. I was so disgusted with the situation, especially as I was not really all that aware of what Steam was initially, and I don't buy games and play them immediately, just buy them in a good sale. Once I realized, it was too late, and doubly worse was how small the print (in many cases) on the case advising of the Steam requirement, which I found downright dishonest. Extremely hard to read in poor lighting and in bad colors.
I'd purchased the Valve 'Orange Box' and SiN: Episodes box games (as discs) and lived to rue the day. I never got past attempting to play the original SiN game which came with SiN: Episodes.
Up to that point I'd been religiously grabbing CD check cracks for all my bought games. I'd become so disgusted with the advent of Steam and what it meant, that I just gave up buying PC games altogether, especially as I had real trust issues. I just decided to stick with the games I already had plenty of. Later I did obtain lots of abandonware games or run copies of friend's disc in virtual drive programs.
By the time I was re-introduced to GOG (could not use them originally due to modem speed and no faith in purchasing online at that point, not even setup for it), I'd long since stopped bothering with friend's discs and cracked exe files. So to me GOG were like a breath of fresh air, and no need to bother getting games any other way. I could survive without the games not available at GOG, and sometimes I just had to wait for them to turn up at GOG. I've got more than enough games to go on with. Eventually, with a far better web speed I entertained the idea of Steam again, and even made a very low priced purchase of the Valve Collection and over time a small handful of other very cheap games at Steam. And in the last couple of years especially, the number of free games from several stores has been huge, so I'm not left wanting for much ... though a few AAA games I am missing would be nice ... but not with DRM ... unless free.
I don't reckon I will be able to play all I've gotten, just once, before I die.
Ranayna: They enabled todays vast indie market. Before Steam, independent games were rare.
You've got that backwards.
If not for the success of Indie games via sites like Itch.io, I doubt Steam would have even bothered. Just like they did not bother with old games, until GOG were successful with them.