Here is one framing: If you have a site that has high user turnover, while also having a stable number of users, then if you increase your retention by just a tiny bit, you are now in the dimension of exponential growth (and if your retention declines, you are now in the domain of exponential decline). It actually feels weird to have as high user turnover and overall visitors as we have, with some significant retention, but in a way that is almost perfectly cancelled out by people leaving (I have some thoughts on explanations of this that I might write up some other day).
Here is one framing: If you have a site that has high user turnover, while also having a stable number of users, then if you increase your retention by just a tiny bit, you are now in the dimension of exponential growth (and if your retention declines, you are now in the domain of exponential decline). It actually feels weird to have as high user turnover and overall visitors as we have, with some significant retention, but in a way that is almost perfectly cancelled out by people leaving (I have some thoughts on explanations of this that I might write up some other day).