The normal route on Everest is a series of ascents punctuated by flats that are used as staging area’s for further climbing.
First you climb the Khumbu icefall from 18k to 20k.. then the long trek across the western cwm at about 20k to the Lhoste face.. then you climb the 5,000ft Lhotse with one camp inbetween to the South Col at around 26k which is were most of the crap is left.
Its the final camp before the summit assault and the refuge for returning summiteers so you get loads of spent oxygen bottles.. trashed tents.. human waste.. stove fuel cannisters.. sleeping mats etc.
It was treated as a dumping ground for years until people decided it was starting to look like a county tip.
The bodies are higher up, on the dicey sections of the climb. Not impossible to retrieve but hardly worth the risk.