"Ruud Broens" wrote ...
With respect to welldefined edges, optical is clearly
superior - even the plastic 850 nm home variety - to coax.

For 2-3 feet, maybe. But for long distances, not clear whether
any light at all makes it through those cheap plastic extruded
"lightpipe"?

OTOH, if you're talking about proper glass fibre, yes
indeed, it beats coaxial cable over long distances. But
the OP was asking about cheap plastic Toslink.