Even if optionally disabled, hiding the resource location seems very dubious while the breadcrumb structure isn't applicable to all sites. I would much prefer

Even if optionally disabled, hiding the resource location seems very dubious while the breadcrumb structure isn't applicable to all sites. I would much prefer that sites be developed with good REST techniques, with the goal of making easy to understand URLs. Over time I think more sites like Amazon will get on this and make cleaner URL structures.