We are a large website company who have many hundred clients, and are now looking for the best alternative to Muse moving forward.
Please can we have your suggestions and any details to back up your suggestion.
As of now, we don't have enough words to express our regret.
However, I have started a discussion on discussing alternative solutions and migration paths - https://forums.adobe.com/thread/2470136 and will be inviting our experts here to participate.
Please bookmark this forum post for reference.