SegWit isn't the final solution to scaling Bitcoin. It's a small one time capacity increase, but it also fixes a bug that will allow for easier scaling in the future.
i see you have read the failed script.
i dare you to actually explain the fix lol
hint: you have to explain how it cannot be countermanded or used as a new attack method itself
... i expect silence or lack of knowledge and just another paste of a salespitch of empty promise