grammaticality - "Not only..., but also" without "but"

As far as I understand, this structure is grammatically correct:

Not only would it provide ..., but it also would...

Can we omit "but" without introducing a mistake?

Not only would it provide ..., it also would...

I've found the following explanation here but I think this example has slightly different meaning:

Usually, a "not only" feels lost without a "but also" to pal around
with. However, it is idiomatically possible and acceptable to omit the
"but also." Burchfield gives this example: "Rowers not only face
backward, they race backward." Authority: The New Fowler's Modern
English Usage edited by R.W. Burchfield. Clarendon Press: Oxford,
England. 1996. Used with the permission of Oxford University Press.
(under "not")