That's what people tend to think for a number of years, however, 10 years later on finasteride/Min, there will be some thinning, and you're gonna have to come to terms with that or get a transplant. That's not just my own experience, you can google numerous statistical entries on baldingblog.
Well, the site has quirks, that's putting it mildly. Not the first time. Sorry, but I wish we could have a forum which is not down several weeks on end.
For me, it doesn't work on the most hairless areas. It works best where there's some hair. (Doing it at 1.0mm, and at the end of the session switching to 1.2mm (to compensate because the Derminator gets a bit clogged with blood and detritus). As for the intensity, it's usually three or four...
Hm, I was wrong about the last part. Dr. Rassman does mention Dr. Pen and dermapen on his blog and on tressless several times. Although I haven't found a quote of him discussing the advantages or disadvantages of dermaroller vs. device.