i think the video game "Rage" which came out in 2010 already relayed on fast storage. The "megatexturing" idea clearly showed a difference between HDD and SSD storage in terms of "texture popping". But I don't know if later "ID Tech" engines continued to use this technique or not (I always had a relatively fast SSD, so I wouldn't know - Rage is the last game where I read complaints from HDD users - most of the DOOM 2016 players probably had an SSD already). BTW, HAGS seems to make ~0 difference. It's already a default in Win11 (the toogle button present in Win10 disappeared.from Win11 and GPU-Z says it's enabled). I read an article which said it's only relevant for multi-GPU setups. I persoannaly don't belive that DirectStorage will bring any meaningful improvements other than level loading times (e.g. loading screens, not in-game transitions of map areas). Or they will cut the halt time from say 16ms to 8ms. But the small stutter will still be present (in games which are programmed in a way to halt rendering during these transitions and asset-loading). Although a significant reduction of halt times might be just enough to make them unnoticeable (at least with VRR).