It isn’t just about ungoogling things though. Having a monoculture in the browser space means that if Google makes a push to favor ads, say by removing certain extension support from their browser engine that everyone uses, then the entire internet suffers. It is effectively a monopoly.
Mozilla tries really hard sometimes to be unappealing, but there is value in not just letting Google have full control over the internet.
https://wiki.lineageos.org/devices/beyond1lte/
I just recently got rid of my oneplus 5 because the volume button stopped working. So I understand the motivation. But LineageOS has Android 14 running on the S10 and its very possible that when they release an Android 15 version, they also support the S10