- Edited
Saijin_Naib 5.10 would be our current, not LTS. Our linux-lts is designed for what we consider older, "legacy" hardware that has notable regressions in newer kernels. The RCs aren't available since they're just on an experimental source repo that we have, not something we're going to be supporting more broadly since it'd require additional driver support, build time, etc. Mostly used as a rare playground to test changes or in this case, just get a head start on 5.10 so we can push it to unstable as soon it's released as a proper stable release.
@DataDrake has a fairly clear idea on how he wants to address LTS going forward. My work / testing is limited to future current.