When I got my first A500 the only monitor I had was a amber mono...
It really had a high-persistence phosphorus and I was able to run interlace mode with almost no flicker. the pointer ghosted and obviously was not ideal for a 4096 color machine. I could easily read 80 column text though.
AMAX for example, if you have ever seen the Mac desktop running in interlace - it was pretty bad with the way Mac OS tiles pixels and draws rows of 1 pixel lines.
looked OK on the old amber screen...