[gnufx]

It uses ecloud for the portal, defaults to the provider DNS (but you can change that), and treats any behind-the-scenes contact with Google (and others) as a bug to be fixed.

I don't think the support range is misleading at all, looking at the device lists, whatever versions are involved. It's support the same as for any free software OS, with maintenance and frequent OTA updates, not random XDA downloads. I don't know if the company provides commercial support. I'm not a developer, so I can't comment on the degree to which they care about security other than it relates to privacy, and the firmware quotes a recent Android security level.

Of course, /e/ is built on LineageOS, and obviously indebted to it. (I was disappointed to find it hadn't been contributing back changes.)