Yeah, there are some caveats to using desktop portals this way, but at least it'll usually give you a native dialog. I do wonder what happens on a machine with no desktop portals, though. I suppose in the future it probably would be feasible to implement a decent file picker directly in GPUI as a fallback, so it's not that big of a deal; I reckon they could make one that's more usable than the GTK one anyways.