They certainly used to. My wife's 2012 MacBook Pro has upgraded RAM and SSD parts I've put in over the years and still runs fine, though it isn't used much anymore and OS upgrades stopped a while ago.
Their current environmental marketing is pure greenwashing bullshit and their stances on upgradability and repairability are terrible.
I'd argue the SMS/MMS reliance in the US is entirely because there have been no caps on it for years now. Nearly all plans you can get here have unlimited SMS/MMS included, even cheap prepaid ones.
Having a fixed allotment of texts or minutes hasn't been a thing for over a decade at this point, and the only thing that's expensive now is data.
Right, nearly all US carrier and MVNO plans have offered unlimited SMS and MMS for years now. It's free, it's built-in, and it's easy. For most, it doesn't matter if chat apps are better, so it's been very difficult to convince people you chat with to switch to a different app.
Yeah, if Voice doesn't have RCS support by the time iOS 18 launches, I'll be moving off it for messaging. Have a number of text groups with iPhones that will benefit from everyone on RCS, most important knowing that my group messages were actually received. MMS still randomly drops messages or they get massively delayed or received out of order.