It doesn't happen often, but yes - occasionally a workout or program gets updated significantly or retired from the site entirely. There's always a reason, and it's never because the content was bad.
Sometimes a workout or program gets retired because it's no longer relevant - fitness understanding evolves, and something that made sense when it was created might not hold up the same way years later. Sometimes an update takes a program in such a different direction that it makes more sense to release it as something new under a new name, rather than replace what people already know and may be mid-way through.
If you're following a program and it disappears or changes, we understand that's frustrating - and we're sorry when it happens. The goal is always to make things better, not to pull the rug out from under anyone. If you have questions about a specific piece of content that's changed, the Community is the best place to ask.
