When controlled for alcohol and drug use it's actually pretty a pretty insignificant risk. 50% of families admit to cosleeping in the UK, I suspect that's likely to suffer significant under reporting.

I think it's far better to do it deliberately, knowing where the baby is and deliberately positioning to avoid the possibility of rolling towards them, than to do it via exhaustion at 4am.

And our 3 year old coslept until 6 months and has slept 8pm to 8am in her own bed ever since so if that's counter productive I'll take it.