With this latest, smoother feeling version of SB66’s, not at all. I’ve been using them on my early 00’s MIA Fender Precision Bass, for about the last two years, and it’s frets are looking fine.
IMO the outer surface of the D’Addario Prosteels that were previously on my P-Bass felt rougher than the current version of stainless steel Rotosound SB66’s.
The more abrasive feeling version of SB66’s that I used exclusively from the late 70’s to the mid 80’s beat up the frets on my ‘76 Rickenbacker 4001, but bear in mind, the frets that Rickenbacker used on the 4001’s back then were fairly narrow, and I’ve read they were made of a much softer material. During that same time frame, I also used them on an early 70’s Fender P-Bass, and it’s frets held up just fine.
I would dare to say, unless you have a really heavy fretting hand, and you do tons of string bending, you’ll be fine using them. As smooth feeling as this latest version of SB66’s feel, you’re not going to experience any difference in fret wear using them than you would using D’Addario XLs.