Thanks for the guide, Paul.
After 11 months of FP2 OS (without any serious problems), this thread took away my fears of switching to Open OS and I did it.
I still think it is unnecessarily complicated to switch and I do not look forward to performing an update like in this thread.
Also I’m slightly disappointed in the amount of apps not being available for F-Droid, so for me there’s no way to use my Fairphone without Play Store. Many of the equivalent apps in F-Droid do not work or are complete trash compared to a lot of apps I use from the Play Store.
So the entire OpenGAPPS thing to me seems like an unnecessary workaround and makes me feel like this is really not the way things are meant to be.
Still, I’ll keep my Open OS because I like the idea. Have not run into a case where I’d need to root though.