@gianni i doubt that one develops a new format with either less features and not state of the art filesizes. Thats not how the image format development process has worked in the last years.
As i said, i have nothing against new format like jpgxl, i just think that they should focus the implementation on one format and not on multiple at the same time. It would be very very stupid to delay a stable new format over all browser just because something new and better got released.
In general i just prefer a stable development process than the current feature creep shit which evolved in the last years in Frontend dev.