Thrunite Catapult V6 and Lumintop ODL20C V2 also new 26650 releases. Looks like Lumintop went with 26800 for the new D3, though.
26800 is where it’s at for fat cells. It offers more than any 26650, still, although it sounds like this new 26650 may be a great general purpose choice with more capacity for replacing cells or in lights that can’t (or don’t wanna be) upgraded with longer tubes or adapters. For new lights, it makes the most sense to go with 21700 or 26800 though. In the nonflashlight world there are still plenty of devices that were designed for 26650 (and cheapie flashlights, too) so they’ll need good cells as well.