> There are a few Social Media Apps, Messenger Apps, Banking Apps which I consider essential to every day users and cover 80 - 90% of their usage.

Who will make these apps for the new platform? They have no need to develop for a new platform in hopes it becomes popular, and very few of them have open APIs for the platform to make their own third-party apps.

The platform owner themselves. Obviously it wouldn't be an idea for startup. But OpenAI, Meta, or Tesla could have enough leverage to do so. Or even Amazon.