DE
Yes, the move away from playout from Tape or Film has definitely improved transmission of recorded programmes. There were
lots
of things that could go wrong with VT or TK machines. VT decks could suffer from headclogs which would marr picture and/or sound quality. TK machines could be very tempramental and it was a skilled job keeping them on-air. Feature films also had to be 'panned and scanned' to fill the TV frame - again a skilled job. ISTR the pan/scan information could be recorded onto tape to run alongside the film in transmission so that a pre-programmed portion of the frame would be transmitted. This did occasionally slip out of synch and could lead to all sorts of nonsense. Sound could also slip out of synch as well. Of course both film and VT transmissions could be interrupted by finger trouble, machine failure or switching problems to the transmission suite.
Servers have their own issues of course, being essentially computers, but they're almost aways backed up and running in tandem into the transmission suite, plus if all else fails there's often a tape copy in the building which was ingested in the first place (though electronic file delivery is becoming much more common).
Finally, companies that specialise in channel playout often have major contingency plans to ensure the transmission of services even in the event of major systems failures at their main facility.
Servers have their own issues of course, being essentially computers, but they're almost aways backed up and running in tandem into the transmission suite, plus if all else fails there's often a tape copy in the building which was ingested in the first place (though electronic file delivery is becoming much more common).
Finally, companies that specialise in channel playout often have major contingency plans to ensure the transmission of services even in the event of major systems failures at their main facility.