No, not even close. On Intel in some chipset(s) Vulkan is not as performant as OpenGL 4.6.
Gallium3D with Iris it's the future against the old pipeline, tho. For instance, I get OpenGL 2.1 in my netbook with the new drivers, 1.4 with the old ones instead.
If these vendors came up with different enough hardware to need a new driver from scratch, they'd just focus on Vulkan and use Zink for opengl.
After all, opengl is a relatively high level API. It is sensible to implement it in a hardware-independent manner on top of Vulkan.