When I was in eighth grade my advanced algebra teacher said "I wonder if you always did your homework in pen, would you make fewer mistakes." That was 45 years

When I was in eighth grade my advanced algebra teacher said "I wonder if you always did your homework in pen, would you make fewer mistakes." That was 45 years ago. Now I am a mathematician and I have done 95% of my math in pen since then. I'm not sure how much it helped, but as you said maybe I think a bit more before I write because I don't like scratching out mistakes.