We've been "lucky" with the types of conflicts we have been in with regards to numbers of casualties and how we treat and transport. I am afraid if we battle peer/near-peer competitors we would see numbers reach horrific levels; not percentage of platoons, but whole companies.
The last time we saw that type of conflict was WWII, though one could easily argue, Korea.
Not for nothing...a good friend of my wife and I is a retired O-5, retired mid-80s after 25 years in the sea-going Navy (destroyers). He told me over bourbon one night in San Diego that his entire career was being told to expect 75-100% casualties in a sea war against the Soviet Union.