If those exit polls turn out to be accurate that'll be somewhat a surprising result given that the debate regarding abortion in the Republic was seen as being a much more divisive issue than that for the SSM referendum, and that passed 62/38. An opinion poll two years ago
put a potential removal of the 8th Amendment at 48% Yes, 41% No and 11% Don't Know. It's also quite a social sea change given that a referendum back in 2002
to tighten up restrictions on abortion was only just narrowly defeated, and that the constitutional ban on divorce was only removed in 1995
by an even narrower margin.
Northern Ireland's going to stick out like a sore thumb, with the rest of the UK and it's southern/western neighbours allowing & recognising SSM and having laws on abortion that have moved on from 1861.