2024 Speed matters (via) Jamie Brandon in 2021, talking about the importance of optimizing for the speed at which you can work as a developer:

Being 10x faster also changes the kinds of projects that are worth doing. Last year I spent something like 100 hours writing a text editor. […] If I was 10x slower it would have been 20-50 weeks. Suddenly that doesn't seem like such a good deal any more - what a waste of a year!

It’s not just about speed of writing code:

When I think about speed I think about the whole process - researching, planning, designing, arguing, coding, testing, debugging, documenting etc. Often when I try to convince someone to get faster at one of those steps, they'll argue that the others are more important so it's not worthwhile trying to be faster.