I think he means like let's say 10k grit can be converted to increase their bonus by 1 point when trying to improve a weapon. Instead of converting 10k grit into 1 bonus why not allow people to accumulate 300k grit then the extra 100k grit over 200k can be used to effectively increase the warrior's bonus by 10 and would be consumed in the process.
I'm assuming the reason they didn't do this is because they don't want people to be able to store more than 200k of a resource because of reasons. I dunno, maybe the game can't handle numbers that large.
I tease of course. Or do I?