Re: DiGiCo S21?
I haven't had the pleasure of seeing a DiGiCo (or any digital desk) "lock up", but in 30+ years I have seen a few engineers do just that.
SD7 on the Irish Female tour.... locked up (surface unresponsive to manual control, requiring re-boot) while the show mixerperson and I were standing there talking about it. Maybe it's just shy and self conscious... Another on a private event I can't mention (NDA), same thing but during the show...
Recently witnessed a MADI rack and surface refuse to play nice with each other (owned by the same company and always paired up together) resulting in the act being moved to an opener's Pro 6 during the set change.
It's routine to see spare DigiCo MADI racks and surfaces waiting on the dock or in a vom. Not so much with others.
They're sweet consoles, Jim, don't get me wrong... but I've witnessed more cranky DigiCo mixers than any other brand. I'm glad your experience has been much better.