I started my transition at age 61. Most of my facial hair was already white, so laser had limited effectiveness. It still got rid of the dark stuff, but I stopped when I started HRT and discovered that estrogen makes my skin light-sensitive. I have a nice "burn" (a large group of freckles) from my last laser. So it is electrolysis only for me from now on.
I have been doing electrolysis for a year and a half, now, one hour every week. It probably would hurt less if I had started it before HRT, but I couldn't hold my transition back that long. I am finally starting to see progress: there are areas of my face that I can get away without shaving for a couple of days, and I mostly don't need makeup. However, the most recent cycle of hair on my upper lip is coming in dark, so I need concealer on it.

As for the top of my head, it is a lost cause. At least HRT has slowed the rate of hair loss. But I have gotten used to wearing wigs.