Irish domiciled MSCI World ETF you would imagine with that title it would be good for irish investors but no, thats the irish taxation system for you. They bend over backwards to get these funds to domicile in ireland and tax them less than they would in other countries, thats the reason ireland regarded as a tax haven . Its almost a brass plaque arrangement the same as you get in gibralter or the channel islands and for which ireland has attracted an awful lot of flak.
Then you have investors from all over the continent investing in this but not irish investors because the irish government then goes and taxes the hell out of them way more than in any other area.