@DaveB - I fully agree with your points and would add that I pretty much tour and commute solely in regular trail running shoes with toe cages and platform pedals as a way to eliminate having to carry redundant sets of footwear. It is not as efficient pedaling but allows for frequent dismounts and sightseeing and I still don't have any issues putting in similar high mileage days when required.When I started riding in the mid-80's I did too since clipless pedals were in their infancy and hadn't made it to the ordinary rider level. However, as soon as I got the opportunity to try a pair, I was sold.
I ride in a lot of hills and the ability to pull up and through the stroke without coming out of the pedals was a revelation and I'd never go back. BTW, I put a pair of toeclip/strap pedals on one bike a couple of months ago to take a short local ride. Never again.
I can walk fairly comfortably in my MTB-style riding shoes during riding time and carrying a pair of light shoes or sandals for off-the-bike wear are a well worth the slight extra weight while touring.