[Eeyore]

Sander deWaal wrote:

A cathode resistor is local feedback, and some even argue that a
triode has inherent feedback.

Strictly speaking that's an *unbypassed* cathode resistor but I know
what you're driving at.

snip

I know of no (commercial) transistor amp that can work without loop
feedback.

It could be done though. It's simply not conventional to do so.

Graham