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it is quite precarious to downclimb to your last anchor (or free solo to the next bolt/placement), then unlock your biner, throw in a munter ,then rap off that single piece, (plus cleaning on the way)
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I hate downclimbing, and your point is well-taken. For that matter, my love of plain old sport abseils got curtailed by a botched overhang rappel on a first date. I made some foolish testosterone-fueled decisions that show up on X-rays 20 years after the fact.
With bolts, any runner requiring more than one grunted swear word for me to reach and clean would be abandonware in an emergency descent.
If going trad, I'd be inclined to leave any hard to remove pro up there instead of trying to clean it. It helps that I only have a tiny rack of a few hexes & nuts, don't climb any more, and therefore don't have to worry about leaving expensive Friends up there. Armchair quarterbacking is much easier this way, especially for a guy that could probably barely follow on a 5.8 or a 5.9-- nowadays.