Hard to know. Will the interface be specific to driver versions? Will it require an updated kernel driver for each userspace driver as it does now? I don’t know that we have the answers.
Worth noting that Nvidia only intends to open source the kernel driver. This is only half the driver, as a userspace blob will still be required, and that will remain closed and proprietary.
People hate change. And even now, IPv6 support in new devices can be hit-or-miss. Even most cellular networks in my country don’t support IPv6.
I’d start with checking logs with journalctl as a privileged user. If the device disappears, there should be logs about it. Maybe that will point the way.
From West to East: Not the usual road traveled
Fool me once, shame on me. Fool me twice, shame on you. Another reminder to give the big chains the flick where possible.