There was a constraint - since 2009, the Joint Photographic Experts Group had published JPEG XR, JPEG XT and JPEG XS, and they were probably reluctant to break that naming scheme.

They're running out of good options, but I hope they stick with it long enough to release "JPEG XP" :-)

JPEG XP would have been a nice name for a successor of JPEG 2000, I suppose :)

There's also a JPEG XE now (https://jpeg.org/jpegxe/index.html), by the way.

Incidentally, JPEG Vista would be thematically appropriate.

Good one - made me and a coworker both LOL (in the literal sense) :D

JPEG ME