I don't know anyone down south who'd vote for reunification though.
I would. I have skin in the game though.
I can see a set of circs which would make it more likely.
Brexit is a shitshow and NI get even more screwed by U.K. sympathy for NI grows in ROI.
NHS essentially collapses
ROI bounces back relatively well from CV crisis.
SF performs well North and South, grows in popularity.
Pressure from NI for reunification grows.
Political pressure applied in ROI along with generous economic package to soften the blow.
Unlikely by the end of the decade though.