That's not so much to do with RSA as it does with Perfect Forward Secrecy. In fact, the banks tried to make their own separate TLS standard instead of using TLS

That's not so much to do with RSA as it does with Perfect Forward Secrecy. In fact, the banks tried to make their own separate TLS standard instead of using TLS 1.3: https://www.eff.org/deeplinks/2019/02/ets-isnt-tls-and-you-shouldnt-use-it https://www.eff.org/deeplinks/2019/02/ets-isnt-tls-and-you-s...