You obviously can get a puncture with Marathon Plus - I did. That was before I knew better than to use such tyres. With decent tubed tyres I seemed to get a puncture every 3,500 miles or so. With rubbish tubed tyres that were worn I ended up with 4 on one Audax. With my tubless I reckon I will get a puncture I need to repair in maybe 7,000* ** miles which is nearly three years for me. Done one year already without any puncture that I know of.Better resistance can be achieved by avoiding tyres with pitiful puncture protection also. Comparing some tubeless tyres with cheap stock tyres is apples and oranges. I don't think I ever got a puncture with my marathon plus road tyres, using bog standard tubes, and I certainly never had to worry about topping up with sealant.
Of course, I'm not arguing the case that they ride better, or have less rolling resistance etc, just that puncture resistance can be achieved even with tube setups, one does not need to immediately give up on tubes.
As a get you home it's perfectly ok, I've done it.The handling at 30 psi, on a 700c x 23 or 25 mm road tyre, is borderline Darwin. Side wall cuts tend to turn into tears, and then you’ve got a useless tyre, and probably a knackered rim too.
I've not had a puncture in a tubed tyre since 2011, so you'll need a slightly more compelling argument than that to get me to switch back to tubeless.After two years of using tubeless had my first puncture yesterday, that sealant couldn’t cope with. Used a worm to plug the hole, no problem.
Much easier and quicker than messing around with inner tubes!