There are and have been excellent kite builders for many years.
To me, snag free all started with the MEFM, which was ridiculously innovative, and it's maybe 15 years old. It had covered leading edge connectors in the mid-90s.
And some innovations turn out not to be so innovative. The trick line was supposed to help prevent tip wraps, and yet very few kites have them these days.
Lollipop MEFM and Geezer: