It was already costly to have a masterworked set with just Light elements, but now with four elemental affinities it's just way too much. Makes me want to just stick with what I have and deal with not using other elemental mods

Edit: aside from removing elemental affinities altogether, which may not happen for technical reasons, I think the best suggestion I've seen in the comments is permanent affinity unlocks per armor piece. So, you get your chest piece to 7 on Solar but want to try Stasis mods out, that level 7 Solar affinity will always be available to swap back to for free later on. This would make the big mat cost for swapping affinities far less painful