tubeless have been fine so far (four years i think) regarding punctures, i haven't even carried an inner tube with me, except for the big rides like pbp.
i had 2.5 instances of sidewall failure over my cycling career: once on a commuters marathon plus, due to it's age and mileage (rode home 6km on a flat tyre, cba to fix it in the rain), once on a racing tyre, caused by a sharp debris on the road (booted successfully and rode 20km home), and on tubeless front tyre just before the last year's pbp, when the wheel dropped in between two cobble stones in rambouillet (fixed with superglue, casing luckily stayed intact).