The retrofits (probably completely unapproved chinese-made garbage purchased on Amazon) are awful, but the stock LED lighting on newer cars is too bright as well. Even if it's normally directed down, if you're approaching a car as it crests a hill you'll get a dazzling blinding flash. Older halogen headlights don't do this.

Some places also require that bright headlights are auto-leveling to mitigate this. But many headlights in the US are fixed, and don't move.