I think TV has played a huge part, as has peoples mobility, in softening accents around the world. I know that you now very rarely hear people in the North East speaking like my grandparents did, or like the comedian Bobby Thompson who spoke Pitmatic, which meant he only had an audience in the North East of England. He was old enough, and Pitmatic is different enough from Geordie, that I struggled to understand him when I was a kid. His Pitmatic was different from Northumbrian even though there was a shared mining heritage. There was a time when someone from Newcastle going out in Sunderland or vice versa had to watch how loudly they spoke as it was so very obvious where you came from, I don't know if that is the case now.
I think Gaelic (Irish and Scottish) is lovely sounding language whether you understand the words or not, I really like listening to the early stuff from Clannad and think Julie Fowlis is great too.