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Facebook is basically dead, replaced by instagram, which was not a product developed by Meta, they bought it because instagram innovated more, while facebook stayed the same.

Youtube didn't stay the same, now you have streaming, shorts, and other such things, that they didn't have, they are not "unchanged".

Twitter is not the same either, they changed their whole business model by putting premium up, and allowing people to earn on the platform.

No business, and no platform lasts forever without changing and innovating.

They don't last at all if they never have a finished product.