u/-stumondo-

I feel so many campaigns are a race to save the world / planet / universe. Every day, hour, second could matter, what do you do?

But in reality there's no clock, no mechanical penalty, and the BBEG will be waiting for you after you rest or, travel backwards 2 days to upgrade your gear.

Are there any campaigns, adventure paths, over even systems that handle this well. As GMs, we could always say, well it's day 22, the world ends, but that's a little anticlimactic.

What are the rules do you see ignored 90+% of the time? Cross system and system specific.

For me, carrying capacity. Specifically D&D and PF games, usually ignored either mostly or completely. And when it's occasionally enforced, the 50gp = 1lb, definitely forgotten about.

Beyond those, unless it's an integral part of the game, like post apocalyptic and resource hoarding, or is majorly simplified, like Dragonbane (and others) bulk system, it's generally ignored, beyond the ridiculous.