I've lived and worked in two of those cities (and one other almost as expensive european city) for much less than $100k/year. It's a pretty comfortable lifestyle from about $50k upwards.
Personally I can think of a plenty of other places I'd rather live in where you could truly live well on that kind of money.
Source: I live in the first of those on a similar salary.
Moving to any other major European city would require me to at least double the income to maintain my standards.
https://ie.thesalarycalculator.co.uk/salary.php Says take home on $100k in ireland is ballpark €55,000 ($62k), and living costs are here - https://www.numbeo.com/cost-of-living/in/Dublin -