>>959008Watching this with interest. Walked some of the GR5 for a week in the Alps last summer. I thought boots were necessary there because it was sharp rocks underfoot for much of the way. But I did find them hard to air out - they got very moist by the 5th day. And it didn't even rain. We were doing about 12-15km a day with 9-10kg packs. Those boots were throw away at the end, but had done almost a decade of service. So were cost effective.
I wear trail runners most days as I must walk about 10km per workday, and they are more comfortable than boots by a large margin.
I think if I am doing grassy trails rather than rock, I might try trail runners instead of boots. But make sure it's appropriate to conditions I think.