I figured I'd chime in here...
I have been doing a LOT of testing lately, mostly at low power <10w. All my gear is pretty ancient, takes a lot of tweaking. It's not uncommon for something to start smoking during a broadcast due to it's age. Then, it's down to the bench, repair the unit, and start over. And what sounds like good processing on AM can sound plain dreadful on SSB, and vice versa. If I'm not just doing a short test, such as after a repair job, I try to fire a liner off now and then.
As for live shows... I've done a few, but COVID has really messed up my voice. I'm really hoping it improves, because my voice sounds like it aged 25 years since getting sick in late Feb. The low registers are totally gone now, and it's just plain rough. I played back an SDR recording someone sent me, and I'm like, "do I *really* sound that awful now?" I think if my voice got any worse, I'd sound like Brother Stare.
So, if I'm on and just playing music, it's probably not that I don't *want* to do a live show, it's that I simply do not feel well enough. I can't believe this crap has been so rough for FIVE months, and I *still* have a good day for every 7 bad ones. Wifey has been through the same, although she is probably back to 90% now, I'm still around 60% because of liver and heart issues. Somehow, we both dodged the pneumonia bullet from this, maybe because we both had pneumonia boosters in November.