It's hard to know how things would have been implemented and how the different parties would have behaved, but I suspect it's clients that would need to be convinced by banks and not regulators.
Taking UBS as an example, the interest rate offered on the current account is 0%. The interest rate offered on the savings account is 0.01% (and it comes with some restrictions, withdrawals above CHF 50'000 p.a. require a three-month notice).
Even if they were otherwise identical, why would anyone put their money in the "risky" savings account instead of the "safe" current account? Interest rates paid to depositors would have to rise to make saving accounts attractive.
Taking UBS as an example, the interest rate offered on the current account is 0%. The interest rate offered on the savings account is 0.01% (and it comes with some restrictions, withdrawals above CHF 50'000 p.a. require a three-month notice).
Even if they were otherwise identical, why would anyone put their money in the "risky" savings account instead of the "safe" current account? Interest rates paid to depositors would have to rise to make saving accounts attractive.