The first generation iPhone from 2016 can still be updated with the latest iOs version.

I think that falls squarely under “married to the software”? At least it was part of the spirit of I intended.

You have to admit that there is some gap between "I want the latest re-rounded corners on app icons" (which fits into that category neatly) and "I don't want 4 years of unpatched 0-days still open on my phone" (which I'd argue does not).

I don’t know why I have to admit this, but sure I’ll grant it. I don’t think the former is a reasonable characterization of “married to the software”, I think it’s a caricature.