[iamalizard]

I played Flash games 10-15 years ago on a 15 year old computer. I've tried HTML5 games on a 5 year old computer with a good CPU and lots of RAM, yet the experience doesn't compare at all. I doubt I'm looking through things with rose-colored glasses. I think I remember some games lagging, like if you'd spawned 1000s of enemies in a Tower Defense-type game, but that was very rare.

It's still likely that older games had more users so were optimized while newer games for Desktop don't have even 1% of that userbase since most people use a smartphone for simple games.