DNA update

I guess so but I think it's more to do with the fact that more Americans with Irish heritage are testing and so the gene pool/database grows.
I've already discovered that a distant Irish cousin was a very active sperm donor in the USA in the 1960s so literally hundreds of cousins appear from that source

Mine has changed too and I m now a quarter Scandinavian Well it’s not the dna changing but the sophistication of the testing being able to pick up more minute traces I m presuming
Fine tune it in other words