We aim for solid. I've been upgrading my own node since 0.5 days. You should just be able to roll forward with new releases, nothing breaks, and things get better!

Since we run Greenlight on CLN, we really care about efficiency, too. And the plugin system is pretty awesome if you have a technical bent, for sure. There are some spec things on which we lead: splicing, BOLT 12, dual-funding, which keep making the entire ecosystem better.