I can agree a skid pan/plate can handle dirt OK , but if your doing a lot of demo, and running over broken chunks of broken concrete, blocks, and or things with steel rebar or heavy metals sticking up a, or just lots of big hard rocks, these things don't be as forgiving as just dirt! ansd do most of the damage IMO!
that under carriage and skid plate/belly will see excessive wear and tear from them, so like I said, a lot has to do with what your doing with the machines,
if heavy demo is the game, added costs will be there
ad in a operator that doesn't maybe care, and things only get worse! and why again a GOOD operator is worth more $$ and hard to find and replace! treat em well folks HAHA!
skid plate and under carriage metal will war down, all you can do is either add/replace with thicker mental to slow it down, or replace as damaged! or again stop dragging the bottom of machine on hard things!
ts just the nature of the beast