Companies like Apple, Microsoft, Intel, Pfizer and IBM have been in Ireland for decades. They may come for the tax but they stay for the people. It has a highly educated workforce that is very flexible and easy to manage/work with. I've lived and worked all over the world and Irish employees are the easiest and most fun to work with - even compared to the UK. It's pretty simple to get visas for companies. Accommodation can be a bit tricky to sort in Dublin but it's nowhere near as expensive or bad as San Fran etc. People generally don't mind moving to work here as the work/life balance is good and it's a super safe/friendly place for foreigners and families.
It has some industries with significant clusters (pharma, data, aircraft leasing, finance, tech, marketing) a stable political and social environment. It's civil service is generally efficient and isn't corrupt, it's easy to pick up the phone to them or a politician if you have a problem and need advice - even as a small business.
It's also the only native English speaking country in the EU now, cheap to jump on a plane to anywhere else on the continent or the US and has good internet connectivity.
For more examples: https://www.idaireland.com/invest-in-ireland