I live between the UK and Ireland because I have a better earning potential in the UK. I've lived in various countries throughout my 20's and Ireland has always been home. I am currently thinking of moving home full-time for the following reasons;
The UK has become a cesspit since Brexit. It's regressed to a parochial mindset. It's visibly poorer unless you live in a wealthy area.
Healthcare, although more expensive in Ireland is more accessible and of a higher quality (I work in healthcare). I access healthcare now at home as I can easily see my GP and get referred quickly and easily I'd needed. I do have health insurance at home.
Closer family / community links. I love the GAA community, it's all embracing and does wonders for teaching kids discipline, community and pride in one's locality.
As other have said education is far superior to the UK and more egalitarian. This is a major deciding factor for me as I have a LO and like all parents, I want to give her the best opportunities in life. University fees at the moment are €3000 and again, university education is more egalitarian than the UK.
Although expensive, the quality and choice of food is far superior. Fresh produce is of poorer quality in the UK, it generally lacks flavour. I'm always amazed at how empty the shelves are in the UK compared to home, especially since Brexit and Covid.
I'm aware of the housing crisis and the recent rise in racism. However, I think I'd have a better overall quality of life at home.
The weather is generally worse than here, but Summers can be pleasant and depending where you live, you're never too far from the sea.