And how many millions of people are fairly good at being a software developer?

I think “fairly good” was an understatement on my part… Tim Berners-Lee got a knighthood for being “fairly good” as a software developer, as he invented the worldwide web. Kier Starmer got a knighthood for being “fairly good” as a public procecutor for handling a number of cases of national importance extremely well. What have you done that has significantly changed the country for the better?