[Wowfunhappy]

Which vendors fit this criteria for you?

I am not aware of any, except—somewhat ironically—for some open source projects.

[TeMPOraL]

> Which vendors fit this criteria for you?

None. Hence, personally, I dislike auto updates.

[walterbell]

Microtik has a “bugfix” security update channel that can be selected in their routers mgmt interface. They also provide a “current/stable” channel which delivers new features.