I wonder if BU is aware of the legal implications of a hard fork, forcing a community of investors to accept an incompatible change to the technology they invested in.
If BU succeeds, every Bitcoin holder can probably sue them for their losses.
This is not how Bitcoin works, miners are free to mine whatever they want, investors who just invested and holding can only choose when to sell, so no change for them. If it worked as you claim, Core could be sued for crippling the Bitcoin because many who own Bitcoin cannot use it anymore.