SPT and the multiplayer conversion (Now Project Fika, formerly MPT) are the best ways to experience the game now for a multitude of reasons. I think learning heatmaps and dead locations applies no matter how you play - and the same can be said for bullet penetration, it's just part of the game - but there's a neverending stream of cheaters that feel far worse to lose to than a boss you weren't prepared for. I can get trashed by tagila eighty times and accept that gear is just forfeit, I chanced it going to factory; when I am killed by a head/eyes with no audio five seconds into a fresh raid multiple times a day there's substantially less to learn from and improve on.

Worth noting you can get mods for SPT that change how AI behave, categorize them so some are doing a common farming route, some are moving to quest locations. It doesn't make up for what we lost (the awkward vocal exchanges as you agree to not slay a new player at a starting quest location), but it helps retain some of the spice.