Hi and welcome to the forum
I doubt the RAM will stop Android updates which may reach A16 (A15 definitely)
Users may have a problem running multiple and demanding apps, but I see no such complaint regarding the FP2 which went from A5 to A10 on 2GB RAM
You will also find A11 installed via
Using A11 on the FP3 my RAM usage is 2.7GB, with a partly de-googled setup
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