The selection of a kernel for long-term support is purely a matter of a maintainer having the need and the time to maintain that release. There are no known plans for long-term support for any specific upcoming release.
a maintainer doesn't have "the need and the time" to maintain an entire LTS kernel without a salary. maybe this was cute back in the 90s when usb device config descriptions developed their own meme ecosystem
they just mentioned https://savannah.nongnu.org/projects/quilt/ in the docs. never heard of it
Quilt - Summary [Savannah]