Batman:
never buy a tech product to last many years
buy them for other reasons
I don't agree with this really - this is one of the biggest pluses Apple has had over the rest of the industry, is the (generally speaking) seamless and long supported updates. I could, and have, kept an iPhone for 4+ years, still fully supported.
Sure I wouldn't let it be my only reason I choose a device, but it definitely factors in to it.
I'm sure Android is changing with some of the projects on the go (project treble, where are you?), but last I used Android, the release and support process for new updates was pretty poor still.
All that said - Congrats OP on your new purchase!