If you need help understanding what I mean, look at the credits of computer games released in the 80s and early 90s. You'll usually find a single programmer, with maybe one or two others, who contributed specialised parts like sound/music processing or special effects. No one cared about your particular programming style, because there were no big teams, no code reviews, no PRs. If you had questions, your fellow programmer would simply sit down with you and go over the details until you got familiar with their style and -code.
> failure to adapt to the shop standards usually means your position ends
Well, he runs his own company and has been his own boss for the past 32 years so again - this simply doesn't apply to him.