Thoughts?
I have one concern.
It seems to me that the main reason to specify an LTS kernel is to avoid
the unscheduled breakage that can occur when updating to a new kernel
release series (i.e. to a new major+minor version). Using
"linux-libre-lts" would fail to avoid these unscheduled updates; it
would merely reduce their frequency.
The only way to reliably avoid unscheduled major+minor kernel updates is
to specify "linux-libre-5.10" or similar. The cost of this approach is
trivial: editing a few characters in the OS configuration when one
wishes to update to a newer LTS series. The benefit is that the user
gains control over when these updates will happen, and thus when any
associated breakage will occur.
To my mind, the benefit of this approach is so compelling, and its cost
so trivial, that I can hardly understand why anyone who wishes to use an
LTS kernel would choose otherwise.