I'm a US expat living in Dublin so I have some "on the ground" views. There are some rather significant software dev operations here, but most are offices of large multinationals (Google, Microsoft, Hubspot, Activision, TikTok is building a massive office currently, etc). There is a massive drop off in salary and interesting work when you look for more "local" (Irish or even European headquartered companies). I get linkedin messages from Irish companies talking about paying 70k euro for senior software positions when the going rate is more realistically at like 120k.
My view is that if Ireland hadn't done their tax shenanigans then none of these companies would be here and it would be an absolute backwater (software dev-wise). Ireland has some really great education and talent but the culture, infrastructure, and personal taxes don't lend themselves to a bootstrap/startup friendly environment imo. So even today a ton of Irish people move to the UK, Canada, or Australia for better jobs.