Yeah that's not what I'm talking about at all.

Yes I said it makes sense to consider that DC power. I never said otherwise there.

You seem to have misread my comment. What I said was that as a matter of convention, anything that isnt DC we called AC.

The phrase flowing back and forth can mean a number of things. My point was that it doesn't need to be negative to be considered AC.

When I work on power electronics, and still do, we often refer to the ripple at the output of the supply as an AC ripple as part of the DC. But yes of course we would never consider that an AC power supply. Of course we would still call that DC power. Sure.

Just to be clear. I said anything that isn't DC we refer to as AC. And you picked one very specific example to say "no everyone I talked to calls a DC power supply DC even if it has a ripple" which yeah or course they do. But that's not really related the point I was making