I feel like there are two different kinds of rules that people tend to ignore.
First, there are the rules that are fiddly and difficult and often obscure and/or poorly worded. They actively detract from play by grinding the game to a halt. In most cases, getting rid of these rules seems reasonable and even god.
Then there are the rules that are simply "unfun." Usually this translates roughly to "makes things harder for the players." I am less inclined to feel getting rid of these rules is a good idea. I mean, sure, the game is supposed to be fun, but that doesn't mean it is supposed to be easy. For example, concentration in 5E is "unfun" by many metrics, but ignoring it creates all kinds of other unfun outcomes (especially for the non full casters).
First, there are the rules that are fiddly and difficult and often obscure and/or poorly worded. They actively detract from play by grinding the game to a halt. In most cases, getting rid of these rules seems reasonable and even god.
Then there are the rules that are simply "unfun." Usually this translates roughly to "makes things harder for the players." I am less inclined to feel getting rid of these rules is a good idea. I mean, sure, the game is supposed to be fun, but that doesn't mean it is supposed to be easy. For example, concentration in 5E is "unfun" by many metrics, but ignoring it creates all kinds of other unfun outcomes (especially for the non full casters).