I have been using /e/OS for 5 years, and also GOS. My take is:
- If your phone is supported by GOS, you should go for GOS.
- If your phone is not supported by GOS, you should look carefully and compare between /e/OS and Stock Android.
I had a Fairphone 3, and after 5 years, /e/OS was outdated by 4 years w.r.t. the manufacturer updates. In other words, Stock Android coming from Fairphone was more secure than /e/OS on that Fairphone.
In my experience, /e/OS has a tendency to claim that they support everything, but they just can't, there is too much. And then they complain when GrapheneOS criticises the fact that some /e/OS users believe their phone is well supported but actually isn't. And GrapheneOS is not wrong: I realised I was in that case after 4 years with /e/OS.
> I had a Fairphone 3, and after 5 years, /e/OS was outdated by 4 years w.r.t. the manufacturer updates
Mine is running /e/ and reporting Android 13, which appears to be the last one Fairphone support. /e/ said it was too difficult to support 14 with the kernel involved. It's had continual security updates apart from the Android version.
Edit: Murena make it clear which phones are officially supported and which have "community" support.