I'm up to a 1000 miles into TL so I've a 1k FR and .6K on the rear, I carry a cheap plug kit (so a semi fondue fork and plugs/anchovies) not needed them yet (though I might have had a visit?). But I do carry a tube, though as I did the conversion I know I can get a tyre off to install a tube, else I wouldn't bother, and as I've always carried a spare tube for others as much as myself I probably always will.
My ride buddies with delivered from dealer TL bikes carry tubes but we've no idea if they'll get their tyres off to use said tube. So far the only problem they've seen has been with sealing an event (clearly) from excess pressure that just needed to vent before a seal formed.
On the road it plays out like this:- a spurt of goo that is still going by the time you've stopped needs slight thought, so we park hole at 12 o'clock and hold hole mostly closed but check for thorn/glass, re-spin after inspection and if that doesn't seal then just plug, re-spin and see, and just 60psi is fine generally, but if you know goo is gone from not sealing then top-up (yes I do carry 1 shot of goo) and if plug doesn't work then ring someone. Historically we've had 4 visits, 2 no drama, twice we waited for lower pressure to work, and it did.
Given even a plug might not work I'd try tubing my tyre, but I'm probably not wrestling snotty tyres off for someone else, well unless a pub is handy for handwashing the latex off and compensating me by buying me a beer.
