Interesting view! I hadn't thought about them as pop-up ads. Probably the ideal version of an update is that it works and adds to your existing flow seamlessly, but I wonder what the best way is to intro new features that are separate from your existing workflow... not sure.
Every day, thousands of people use a given app for the first time. We don't bombard them with pop-ups for every single feature. Yet they manage to become proficient.
There's this wonderful expression that people don't buy a half-inch drill bit; rather, they buy a half-inch hole. Every team thinking of adding another cling should ask whether they're selling bits, or helping people drill holes.