Tubeless on everything except my commuter, which I might convert
In 8 years of running tubeless I’ve had 3 “flats” It happens so infrequently I can remember them pretty well.
Tore a tyre at Innerleithen (it was a stupidly light Specialized Ground Control and i was riding like a fanny over a rock section)
Tore a tyre at Fort William (it was a Nobby Nic and i was riding like a fanny over a rocky section)
Unseated a tyre at Carron Valley (It was an Ardent and I was riding like a fanny on a 29er hardtail using a tubeless set up i knew was suspect as I’d mangled the rimstrip changing tyres).
Punctures are so infrequent that on short rides I don’t even bother carrying a tube. I go out with a mobile phone and a water bottle.
It’s really not that big a hassle to set up. I’m not a serial tyre changer but I do run “Summer Tyres” about 4 days a year or change to faster rubber for a race and its not really any harder than changing any other tyre
I can’t see a downside to tubeless