Then look back to 2.2.6, it supported up to 6.10. A far cry from only supporting only up to 6.6 so I'm not seeing where they were going with with their initial statement until they define what they mean by stable.
That's a fair point and I don't disagree. I guess my main point of contention was the implication that either a) ZFS wasn't stable on anything non-LTS or b) the Linux kernels themselves were unstable outside of a LTS.
What stable means in this case is subject to individual use cases. In my case, I don't find having to wait a bit for ZFS to catch up despite being on an EOL kernel to be catastrophic, but after having some time to think, I can see why someone would need an LTS kernel.