We did 2 big live shows years ago almost without a computer on stage.Ok we had a g4 there which was running the scope plattform for synths but no seq on the computer...see it as power supply for the pci card if you want.
The setup contained:
Waldorf pulse/micro q
yamaha masterkb psd something..its long gone.
mac g4 just running a few modular synths on a pulsar 2 dsp card with the huge 17 inch cinema display which was a PAIN to transport...tft disps were very expensive back then...
roland mc 303.....
Ramsa 16 ch mixer(huge)
All was sequenced with a Miditemp multiplayer.Its a 64 track hw sequencer with 2 ch audio playback and midi matrix(splitting routing etc) you could mute all tracks via remote and play yourself or do everything live/different whatever you want.
We recorded every miditrack into it in the studio from our atari 1040 which was timeconsuming.( 5 min song and 20 midifiles...you get the idea)
It was fun but on 1 show....a3000 was loading the second programm out of 4.It loaded normally but the sounds didnt open.That ment we had to get over the 4 min loadtime again.....worked but..yeah.
jp8000 was switching cc parameters( not 1 but like..10!) unasked and we still dont know why it never happened again ever.
The whole setup with gimmicks like bbe sonic maximiser and all the rack gear in a HUGE 25 he metall rack filled my car completly.Big car.
It was so much carrying and cable stuff(2 huge boxes midi, audio, power etc)
As much fun as it was and the people there enjoyed it but id rather use a laptop as sequencer and a few really cool controllers like my monome 128 and whatever.Its just not worth taking all the risk and for us it was too much work aswell.
I have huge respect for the people who do it.
Maybe we carried way too much, we basically had our whole studio just on stage.
For me personally i do enjoy it when i see a ton of gear on stage because i know what it is or do want to find out what they use.I asked countless people on concerts/liveacts/festivals and shocking or not atleast 90% of them dont care at all.They want to have a good time/dance/chat with people and just enjoy themselves.Thats why we surely dont really care anymore about the etiquette of not using a computer on stage.
And i do make a difference between a party with live acts a concert and a festival.
Its just my oppinion and the experience i made on the partys/concerts/festivals ive been to.