Got my first actual flat yesterday, relatively big gash in the rear tire. I instantly detected the flat since the Stan's sealant was spraying on my right leg! Unfortunately, I just changed over from rear rack/trunk to under-saddle bag configuration and forgot to include a number of items. This was a very short recovery ride and I called my wife: first time in my life. I did try to inflate/seal with CO2, but had never had to use that particular inflator: another lesson learned.
I normally carry a very small kit which works to repair larger holes, somewhat similar on a much smaller scale to how we used to repair tubeless car tires. I removed the tire today and found I could easily, I mean really easily, get the tire off the rim with a single tire iron: good to know. I probably have 2500 miles on this tire so I'll go ahead and replace although I do think it's repairable.