The limited benchmarks I’ve seen put the new X Elite at slightly less efficient than the M2 Pro (let alone M3 Pro). It only gets marginally higher scores when operating at 3x the wattage.
Also, let’s not imagine even for a second that notoriously terrible ARM are going to make it easy to support this chip, especially not in the long term.
Ubuntu wants to own snap, with their own proprietary store etc which runs against alternatives like Flatpak and goes against the FOS ethos
Snap is slower and worse than Flatpak (the most popular alternative) in most ways, with very few pros that will likely be caught-up-to soon too