I'm saying that the mode-shift suggestion:

func(arg, name=value,
*, # change to auto-fill mode
alpha, beta, gamma,
)

will rule out any further relaxation on that restriction, and that is a
point against it. That's a concrete enhancement that we might allow some
time. Whether *I personally* want that enhancement is irrelevant.

It doesn't necessarily have to.

There's always the possibility of a second mode switch, perhaps using the same indicator as the one related to positional-only signature syntax:

func(arg, name=value,
*, # change to auto-fill mode
alpha, beta, gamma,

/, # change back to normal positional mode

delta, epsilon
)