Thank you for that perspective and congratulations!
If I may ask a similar question: did you feel, once you signed up the first employee, that there was a point early on that staff growth was too slow or too fast?
Over the entire 10 years it's always felt like we have been too slow to hire and needed a person in a role 3-6 months earlier.
We were a team of 5 when we hired our first full-time customer service agent. Until that hire, we would each take a day of customer support which eventually meant that our iOS engineer was answering user emails for ~6 hours a week.