IMO, i don't think platform or hardware has a bearing on the content and mechanics of modern games; I think game software is marketed, and always has been, to the demographic who mostly plays games. In today's demographic, who has time to play all these games? Well. . . kids. Gas, food, rent/mortgage, utilities have doubled since the late 80s and 90s, but wages/salery increase has definitely not been proportional to inflation. Parents/grandparents, the GOG gamers, are working multiple jobs/gigs/side-jobs to raise NEW gamers.
The first job I ever had (I'm 47) was back in 1992; it was for a landscaping company. . . 8 bucks/hr (Kentucky); unemployment was around %1-2. . . why, Mickey D's was hiring part-time for $9.50-10.00/hr; I think minimum wage at that time was $5.75 (Kentucky). My folks were doing pretty well, and could afford to have only one job; I was doing all-right, and also could afford to work a single job. . . and I had time to play Quest for Glory, Ultima Underworld, Star Trek 25th Anniversary, Dune. . . etc. And my mom was playing some of these too (Laura Bow, Dagger of Amon Ra).
Okay, so, I just looked up some job postings in Lexington, Ky., and here's a listing for a Starbuck's "barista": $9.20 - 9.25/hr. . . note the nickel variation in wage. . . I guess $9.25 if you have LOTS of experience, and no job-gaps lol. Actually, that's too pathetic and tragic for a lol.
My tl;dr point is, and I apologise in advance, the demographic for whom games were made were 20s-well, hell-60s (my grandfather loved Bowling and Video Golf on the 2600 VCS. . . he was actually the first person on both sides of the family to have a game-console, and consequently, the first gamer I ever knew); and software cost the same then and it does today, actually sometimes it cost more. An Atari 5200 (yes, I actually had one of those, well, it was my mom's) cartridge in the mid-80s was between $30.00-$50.00. And yes, many people could actually afford these.
Children, bah. They were NOT allowed around the PC (which were much, much more expensive back then). We actaully would quarantine and erect a Dr. Beverly Crusher forcefield around the PC area. . . it was off-limits, VERBOTEN. And besides, most of the PC games back then exceeded the attention span of most kids back then. . . most.
So, what's most of that 80s-90s demographic playing now? Time-wasters on iOS or Android. . . Angry Birds, Lara Croft GO, The Room, or some other $1.99 Fiddly-Diddly. Our lives are cheap, our time is cheap. I'm not insinuating these are "bad" titles; they're just mediocre respective of what we would actually enjoy playing, if we had more time. And then there are some would just dawdle what litte free time they have with Facebook (zzz Words with Friends zzz). . . for whatever reason.
I, myself, am fortunate, recently, to play Morrowind, Witcher 2 & 3, Anachronox, Quest for Glory V, etc.. . . games that you can't just play "10-"30 a day. My neighbours, on the other hand, both work two jobs, and I think that is a typical life-style for former Old Gamers.