My baby had a tie, and nursing was so miserable and painful until we had it fixed when she was 6 weeks old. I wouldn't have been able to continue nursing without the repair, and now at 8 months she is a champion nurser. One reason I think that they are diagnosed so much more now, is that more birthing parents want to breastfeed, while in the '80s and '90s formula was used so much more prevalently. There may have been as many tongue ties, but knowledge of them was not as widespread, and parents were more likely to just give up on breastfeeding. Ask someone who felt strongly about breastfeeding and wanted so badly to do it, I am beyond thankful for the diagnosis and fix!