wrote

No because the project emphasizes AM, an old spectrum-hog mode
which ought to have been retired about 1965.

Why? AM is a legal mode, with advantages and disadvantages.

AM is a relic, inefficient in it's use of spectrum, and inefficient in it's use
of power (only half of the transmitted power contains intelligence and half of
that half is discarded at the receiver!).

One of the key elements of the spirit of experimentation in
something "different" is not being constrained by what is
considered electropolitically correct.

I don't know WTF the phrase "electropolitically correct" is even supposed to
mean.

Besides, the Class E technology can be adapted to
a variety of modes.

Yes, it certainly can. Which makes it all the more puzzling that they'd
showcase it with a doddering old mode like AM. Class E is technologically
interesting, and kind of "electro-sexy". Showcasing it in an "AM suit" is
equivalent to showcasing Jessica Simpson in a fully secured HAZMAT suit.

Incidentally, the technology is a little older than Jessica. See "Class-E, A
New Class of High-Efficiency Tuned, Single-Ended Switching Power Amplifiers",
IEEE Journal of Solid State Circuits, Vol SC-10, June 1975, pp. 168-175.

Beep beep
de Hans, K0HB