From Sam Altman's blog post about Sora 2:

Optimize for long-term user satisfaction. The majority of users, looking back on the past 6 months, should feel that their life is better for using Sora that [sic] it would have been if they hadn’t. If that’s not the case, we will make significant changes (and if we can’t fix it, we would discontinue offering the service).

By September 30, 2027, will OpenAI make significant changes or discontinue Sora, citing concerns about long-term user satisfaction?

Any "significant change" should be something that a reasonable person might expect to improve long-term user satisfaction by a noticeable amount. It should be in reaction to something negative, so a new feature that makes the app "even better" wouldn't count. The change should be oriented around long-term satisfaction specifically, in the sense that Sora users are "short-term satisfied" while using the app but this is misaligned with their long-term desires, and the change attempts to fix that problem, so something like improved safety filters wouldn't count. Discontinuing Sora counts as a significant change.