As of 2024, literally none of the customers deploying the robots I worked on had ipv6 support on their networks. (We seriously considered switching to ipv6 for our backend controller-to-device network since it would inherently avoid conflicts that way - but none of the hardware devices had ipv6 support yet either, even the ones that were linux boxes underneath; turned out that network namespaces were a better approach to that problem anyway.) These were pretty technophilic areas (within otherwise "traditional" companies - the crossover between "wanting robots" and "being able to afford robots" is a little weird :-) and none of them were even talking about ipv6, to the point that we took "add configuration for ipv6 to the management console in a hurry because a customer wants it" off of our threat-to-schedule list entirely.

I get the feeling it's another 5-10 years before "not getting around to ipv6" will actually be a mistake in that space...