While that might be a neat write-off mental model for the convenient few, from the perspective of most of the world, many modern software developers is live in affluent situations where processing power, memory, screen size, and connectivity are basically guaranteed. Anywhere else (much of the world) has issues with the systems they design.

This is not a 5% thing, it's a >50% potential users thing. Viewed that way, it makes commercial sense to consider them. However, SaaS was usually an exploitative now-or-never growth model seeking unrealistic returns in a short period based on false economics, so give-a-damn was already managed out of corporate scope.

The off the grid experience and journey discussed highlights how little hardware and connectivity we really need. Writing that off on the proviso it's economically 'smart' to ignore users misses the intellectual point.