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Lucky you I used to get at least two a month and had to carry a bike shops worth of tubes. Perhaps you should go back to tubes on your card
A customer dropped in today for tubeless setup. I did it in front of him. It took once his old tyres and tubes were removed 20 minutes for wheels. No faff, no mess. That was IRC tyres on superstar wheel using kinlin rims. With those rims it could be mist tubeless tyres and it will be a quick install. Faff happens when the tyre or rim is not up to being tubeless or the fitter has made a mistake. Don't blame the technology for that. It well worn tech. Some manufacturers seem to get confused and make rims to small or tyres to big but that's not the technologues fault just fuzzy logic of some humans. Of course you have fuzzy logic too thinking tubeless is just about punctures. If you don't get it fine but try to avoid telling us all that it not well developed yet or not needed.
Last pair I installed (pro one on chinacarbon™) took me about 20 minutes, tape and everything, with a track pump.
On the other hand bleeding brakes is always a mess to me, and everyone is happy to jump in that wagon