Here we are in 5.15, with 5.18 looming around the corner... And I just discarded no less than 60 (sixty!) pieces of gear. Some of those were added in 4.4 (that's September 2018!), some of those in 5.0. None of them convertible to materia, none of them exchangeable for GC seals, none of them even sellable to vendors. It's basically an exercise in patience, as well as for the clickfingers.
Look, I know this is endgame gear at one point or another, but... We have way too fast a gear treadmill here. We also have endgame gear, an upgrade to all of those, added right in this patch, in 5.1, that is all three of those right out the gate: can be exchanged for seals, can be sold to vendors, and can be converted to materia.
This disparity is simply ridiculous and makes no sense whatsoever. At the very least make all such gear disposable in ONE way, at least with a separate confirmation window even.