When growing the team from a few people to 30-50, assuming you are hiring for the right reasons, e.g., product-market fit, a few things tend to happen:
It seems counterintuitive, but what ends up happening is that the productivity per person drops and the team's output is decreased, although the number of people increases.
I wrote the full article here, with a how-to run product meetings, to make sure you are still getting the best ideas to win, from everyone in the team