It might not be, I'm just going off of intuition. I think it might "lag" in the sense that the annoyances / inconveniences that get gradually introduced don't

It might not be, I'm just going off of intuition. I think it might "lag" in the sense that the annoyances / inconveniences that get gradually introduced don't result in a linear reduction of users. I think you can get a sort of "frog in boiling water" type situation, where you're gradually getting less utility out of the product or subconsciously more annoyed with it but you don't really realize it and take action until some threshold is hit, at which point a large portion of users suddenly jump ship within a very short time window. Pure speculation though.