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Also modern stamp mounts don't allow flipping stamps up. So if the "hinging" benefit of hinges is not used much, do stamps need hinging? Could they be glued to the album page instead?
Some collectors use Hawid-style (drop-in)mounts because the stamp is easy to repeatedly remove and insert. With this type of mount, it's easy to remove the stamp and examine the back, for example. If you collect classic MNH, you should probably use this type of mount, anyway, as they're less likely to affect the gum than the split-back type.
Using glue to adhere the stamp directly to the album page only makes sense if you don't care about the stamp's future. Any storage/display method should make it easy for a stamp to be removed and/or replaced.