I think the problem with those devices is more that security updates for the OS itself aren't released anymore, not that new apps don't work. My mom doesn't ha

I think the problem with those devices is more that security updates for the OS itself aren't released anymore, not that new apps don't work. My mom doesn't have a lot of apps installed on her phone, just something like maps, the local transit provider app and whatsapp. She sometimes browses the web. I actually installed LineageOS on her phone a while ago, but I think even that isn't updated anymore (for her particular model).