There's actually a few new story mods out there! I haven't played a lot, and I think many of them are not translated from Russian (the biggest Stalker fanbase is still Russian speakers), but they do exist.
And yeah, the labs/bunkers is something stalker games usually do extremely well and are genuinely scary. I think the cool thing about them is that they're confusing and tricky to navigate, and instead of having obvious parts loaded with tons of dumb enemies to shoot, they're mostly dark and empty, and only have a small number of enemies that are EXTREMELY deadly and hard to kill in that confined environment (snorks, burers, controllers, poltergeist). The dread I always feel walking into an empty dark bunker in Stalker is always palpable - and the best part is that many bunkers in the game are actually empty or not very dangerous. But the game scared me so much with the ones that weren't empty that it actually made me develop a phobia of bunkers
