>>715738316 (OP)Old School Runescape feels good because it uses its simple and generic art style and sandboxy gameplay framework to achieve transcendence within a genre defined by over-complication and over-detail.
Runescape's art feels like the aesthetic bridge between symbolic pixel art and the ultra detailed PBR graphics of modern games. Everything is so clean, so easy to see and discern. There's none of the noise and distraction of modernity, yet it has it's own soul and style and enough clarity that it's more than just a pixel sprite roughly representing a knight or rock or dragon. Because of this, it's HIGHLY effective at visual communication and therefore makes the world more immersive. The same effect can be found in minecraft. Your brain immediately knows what everything is.
Runescape also embraces the generic. It feels like classic fantasy. It's not Dark Souls skeletal husks with brass armor, or World of Warcraft with its hulking geometric armor pieces and zig zag patterns, nor is it ultra realistic like Kingdom Come Deliverance. It's just simple fantasy. A wizard wears a robe. The first robe you imagine when you picture "wizard". A knight looks like the first thing you'd imagine if you thought of "knight". And because everyone else is trying so hard to be weird and different, Runescape feels pure.
Lastly, Runescape's gameplay is just so freeform and sandbox like. The world is just there for you to explore and interact with. Efforts take time, but rewards are ample and predictable. You can do anything you want with no limits except effort. No tough decisions on class choices or perfecting builds, you just enjoy the game and get rewarded no matter what you do. Simple and full of freedom.