To expand on what you're saying: when a user base forms habits around a product—especially something they use on a daily basis—changes no matter how good can be

To expand on what you're saying: when a user base forms habits around a product—especially something they use on a daily basis—changes no matter how good can be jarring as a result, and thus have a negative impact. Perhaps Snapchat as it exists now would've taken off just the same, but because the new version represents such a jarring departure from the old, it flops. A better example of this might be Microsoft keeping the Start Menu for over 20 years. While some cheered for its demise, most users decried the change at the time. That said, the problems with Snapchat as it exists today run far deeper than merely disrupting people's existing habits, so it's not the best example. Personally I think the app is now poorly-engineered trash. Nonetheless, the notion is an interesting one to at least consider, if only in an abstract sense.