That's great if you don't need any amplification at all, or perhaps nothing more than a typical guitar/bass amplifier. Big venues need a lot more hardware than this.
“Big venues”. lol. I’m sure when Metallica played in russia in 1991 for the 4th largest concert in history it didn’t really happen because according to you they needed digital (glitchy) hardware.
They don't have the old stuff any more. It's like trying to land men on the Moon now: the Apollo hardware is all gone, except the stuff in a museum that doesn't work any more.
Why? (Disclaimer: I'm not a professional in that industry, so I don't really know what I'm talking about.) Just as one example, the microphones and guitars these days are all connected to the mixing board through wireless radios, which we can assume are using digital protocols (just like all other wireless comms these days). Long gone are the days of ridiculously long cords that musicians trip over on stage. So at least that portion of the audio path has to be digital. And from what little I've been able to see of a modern mixing board from the audience, they look quite modern, with computerized displays, so of course they're going to be working with the audio digitally.
Wireless transmitters don’t immediately imply digital. But I see your point. I haven’t done sound reinforcement in since the 90s. The body mics we used weren’t digital. Shit I’m old. I’ll just stop talking because my initial post was an attempt to channel Randy Marsh showing the gang how to play a real guitar instead of Guitar Hero but then I talked out of my league. lol.