I use /e/OS on an S9 and I update regularly by OTA, (if I’m not mistaken) I’m with the rom: e-1.17-r-20231109350749-stable-starlte.zip. I’ve had /e/OS installed on this device since May, and so far I’ve had no particular problems, and I’m very happy with it: everything works fine, as do all my applications. I’ve migrated from Q to R without any problem, and I’m sticking with the stable versions. I saw on the forum that you can switch from R to T, but I understand that T for the S9 is still under development.
In the meantime, I wanted to thank all the team around /e/OS as well as this forum which helps me a lot, I wish you all happy holidays.