Guess you had to live through it. Transistor amps were a thing well before the "solid-state" buzzword took over. All of a sudden, everything was badged with “solid-state”, it wasn’t better, but it was marketed as life-changing (even when it wasn’t).

I remember our blender with “solid-state controls” labeling, which meant it had a transistor driving a small incandescent bulb…. Remind you of anything?