Noise scares people away.
As your community grows, members will leave because of the noise. It’s a good case against indefinite growth.
A solution is to highlight and amplify the good stuff (the signal).
Round-up the best posts and discussions of the day. Identify the most important decisions to be made. State the single most important thing a member can do for your community that day.
Make it simple for time-stricken members to feel like members without committing an ever-increasing amount of time each day.