Talk about an over-reaction. I simply DGAF, that's all.
The number of heirs would have no bearing on abolition. Think about it.
I didn't say it would.
The point for the House of Windsor is there's no realistic prospect of them running out of suitable male heirs, let alone females, for several generations.
Thus while the public still want a monarchy, it's hard to see the monarch being anything other than a Windsor.
If the public as a whole don't want a monarchy, eventually there won't be one so it won't matter who the monarch would have been.