Man I want to put LED bulbs in my 1999 model year car, but I don't want to start blinding people. The last thing I want is for someone to hit me because they were blinded. It seems many LEDs do intend to have similar beam patterns to halogen bulbs, but I'm not sure how well they actually do.
Our 2020 Mazda has LED headlights, and I gotta admit, they are much better for seeing. We live off the beaten path, not a ton of traffic, but plenty of deer and other animals.
On the other hand, my headlights in the 1999 had gotten really hazy, and I recently did one of those headlight restoration kits to it, and it worked stunningly well. Since then, I haven't driven at night very much to get a feel for how much it helped. So maybe I won't need LEDs. (The halogens in there are relatively new.)