Older games were more likely to be complete, QA'ed experiences compared to today. Golden-era Blizzard epitomized this with their "when it's done" mantra. Now, rather than using the internet to patch a game out of necessity, it's patched as a matter of course. Most games now are sold (and pre-sold) on flashy promises, but ship incomplete, and are then patched over the ensuing months. Further, games now are all about dominating your time, keeping you "engaged", and spending beyond the initial purchase. It's not enough for you to buy it and play it. Now they want you to keep playing it, preferably exclusively, and keep paying for it, whether it be by way of subscription, season/battle passes, or DLC.
Gaming has always been about making money, no doubt. There were shysters and trend-chasers selling shitware for the Atari 2600 just as there are now. Only now, it feels like there are so few companies (if any, really) who are actually trying to satisfy the modern gaming customer, as opposed to addicting and exploiting them.
The saving grace is indies, but most of those games lack the graphical sophistication that many of us (not least of all, myself) expect. I mean, if you would have told be that so many modern games would be pixelated 8-bit retreads or flash animation projects, I'd have told you to pass the bong.
But, yeah, to me, the biggest difference between now and then is the way I feel about my relationship with game companies. In the 80's and 90's, gaming companies felt like entities that cared about their customers, and worked to 'wow' them. They had tip lines you could call for help when you got stuck, ffs. Now? It's a corporate wasteland. They don't give a fuck about you. They'll take your money, maybe give you a functional product, try their best to addict you, and refer you to a message board for your insignificant issues. I used to feel like a customer. Now I just feel like a sucker.
EA is the perfect microcosm, I think, that exemplifies the industry at-large. Look at what they once were. How they innovated. The quality they were known for. And look at what they are today. Too big to fail, resting on their laurels, incessantly milking just a handful of cash-cow franchises, pumping out iterative shit that hasn't significantly improved for literal decades, and yet are massively successful in spite of it all.
It's absolutely befuddling.
With room for exeptions, I think it boils down to this: In the Golden Age, we played games. In this one, the games play us.