Rustaceans at the border

I would like to see a clear explanation how the maintenance flow would work with stable and long-term kernels and all these editions. The oldest long-term still in maintenance was released in late 2016. This looks like initially a nightmare for backporting and bisecting stuff. I admit that this might be because my lack of experience with Rust but that's why Rust community should be able to explain this so that you cannot misunderstand instead of just referencing Rust documentation.