Just returned from 2 years working in Ireland. I generally agree with the observations. Some points from my particular experience:
While Ireland does have a public health system, it's quite common for people to have private health insurance, too. As mentioned, this helps particularly when you need a specialist. Waiting times for some specialties beyond a GP is measured in years for public services.
Prescriptions are a different world. Our insurance paid 50% of prescriptions, up to $25 per year. Only my wife used the full benefit in any year.
As a "special assignee," I got a 30% tax credit on my income over 75k. That roughly made my net income about equal to my pay in the US. (This would only last a maximum of 5 years)
Food prices were the same or much lower than in the US. A lot of this is due to the presence of Aldi and Lidl. We got Lidl's equivalent of multi-grain cheerios for 59 cents a box.(Any time--not on sale) We laugh / cry to see store brands here above $2.00. Meat and dairy were quite cheap, but of course Ireland has strong local industries.
On the flip side, there are constantly outages of things that are taken as given. These supply chains would never fly in the US, as things are either very limited selection (Just one surge protector available--why do you need to pick among several?) Or making due with substitutes / not quite.
One thing that surprised us was that clothes were fairly cheap. I remember traveling in the 90's, and clothes were something you didn't get in Europe. And my European work colleagues in the 2000's would love to hit the factory outlet store for clothes, either bringing an empty suitcase or buying one here. I even got a great deal on shoes!
Even Amazon doesn't have things figured out: delivery quotes (not Prime) may be a month or more, but actually take about two weeks, on average. It took longer, and nobody really knew what would happen, with any precision. This, despite 5,000 Amazon employees working in Ireland.
But all in all, those elements blended with the mindset in the country, too. It wouldn't work in the US, but the systems aren't catering to Americans, either. You get what you ask for.
We would go back to Europe in a heartbeat, but love our place in the US too. We recognize the differences, and miss things about each. As has also been said, I think it's easier to live (i.e. long term--years) as a FIRE retiree, than to work there trying to achieve FIRE. My Irish colleagues were barely ready to talk defined-contribution pensions (run by insurance companies! Oh, the fee levels!) much less talk about early retirement. The pace is set by the public pension ages, and there are not good alternative avenues for those going their own way.
Someone mentioned "fewer vehicles" but that's not true, at least in France, almost everyone has a car.
I just have to pick up on this. Yes, "a car," not cars, plural. That's the point.