Is there anything preventing the Linux Foundation jumping in and officially supporting a desktop environment? Is it because the two main DE’s are already more-or-less backed by a foundation and the LF hopping in would fragment it even further?

Ubuntu tried for a while to lead their own efforts (MIR/Unity) and in the end, they pulled the plug and decided to just adopt Wayland/Gnome. Do people consider this a good change for the linux desktop landscape?