If conservators (in my experience, mostly pretty sober types who work in libraries and museums) decide in a few years that there is an acceptable approach to drymounting, then it will be easy to drymount any hinge mounted images.
While you can release a drymounted image that uses a "reversible" tissue by putting it back in the press, sliding release paper under it, and repeating until you get it all the way off, it's a pain to have to do it often, and there's always some risk of damaging the print, and in 10 years, when the mount may be, say, discolored from humidity or some other storage or display condition, you or the owner of the print might not know what kind of tissue was used.
The APUG Traveling Portfolio is a non-scientific but interesting real world test of what can happen to prints when they are shipped 20 times in a Tenba Port-FedEx shipping case and handled at each stop. Just the vibration between two mats in shipping causes wear that is quite visible, and it isn't too unusual to ship prints this way. I don't know if the prints have ever been removed by a customs inspector, but I suspect they aren't wearing clean white cotton gloves. At my place, we all put on white gloves to handle the prints, but is that happening at every stop? Have you been in a gallery where you've seen patrons handling mounted prints by the mount with their bare hands? We're all people who care about the prints, and the prints usually hold up reasonably well, but not the mounts, so if I include a mounted print in the portfolio, I remount it when it comes back, because the print is likely to be suitable for display, but the mount won't be.
While you can release a drymounted image that uses a "reversible" tissue by putting it back in the press, sliding release paper under it, and repeating until you get it all the way off, it's a pain to have to do it often, and there's always some risk of damaging the print, and in 10 years, when the mount may be, say, discolored from humidity or some other storage or display condition, you or the owner of the print might not know what kind of tissue was used.
The APUG Traveling Portfolio is a non-scientific but interesting real world test of what can happen to prints when they are shipped 20 times in a Tenba Port-FedEx shipping case and handled at each stop. Just the vibration between two mats in shipping causes wear that is quite visible, and it isn't too unusual to ship prints this way. I don't know if the prints have ever been removed by a customs inspector, but I suspect they aren't wearing clean white cotton gloves. At my place, we all put on white gloves to handle the prints, but is that happening at every stop? Have you been in a gallery where you've seen patrons handling mounted prints by the mount with their bare hands? We're all people who care about the prints, and the prints usually hold up reasonably well, but not the mounts, so if I include a mounted print in the portfolio, I remount it when it comes back, because the print is likely to be suitable for display, but the mount won't be.

