Everything Matters With Digital

And what do you suppose the chances are that a 1 gets mistaken for a 0? 

Slim to none.  That is not relevant to the conversation.  What matters is timing and the integrity of the square wave.  Ringing and overshoot are responsible for most error correction, then data dropouts

Don't you mean mc?

I’ve been upgrading my digital coax cable slowly, for a couple years. THERE ARE BIG SOUND DIFFERENCES IN DIGITAL CABLES. 

If you can’t hear the difference:

1. You aren’t a good listener 
2. Your system is not revealing enough. 3. You made a lateral move in your cable “upgrade” instead of a vertical one.