I was raised in Wrecsam by Welsh-speaking grandparents, originally from Aberffraw. They spoke Welsh with each other, but only English with the children (this was decades ago when Welsh was regarded as being backwards and of no use).
I’ve lived in the U.S. for over forty years now, and lost virtually all the Welsh I ever picked up, but two years ago I started learning Irish in anticipation of my retiring there next year. And somewhere along the way, it started to feel weird to be picking up Irish while letting the last of my Welsh disappear. So I’m going to give SSiW a serious go, and see if I can’t pick up the conversational Welsh I wish I’d learned as a child.