Others may remember it differently, but I feel like things started to change somewhere between 2009 to 2012? People were still hand-indenting code back then, and your personal style felt like something you had a bit of ownership of or was a creative outlet for you. I think we are in a much better place now where the editor + a central config file owns the whole thing, and I'd be surprised to see a modern codebase where a formatter's defaults weren't being used.