Because CURRENT is associated with bugs, and troubleshooting, I believe the threads about it need to be in DEVELOPMENT. Not about CURRENT itself, but about features used CURRENT, so I believe CURRENT discussions should be allowed there. The guideline for CURRENT says to use the mailing lists where DEVELOPERS are, and there's a section on the forum that's conveniently called DEVELOPMENT. This makes sense, and those who post there have an expectation to know the basics of FreeBSD and be prepared to use the mailing lists.
Even if it's not described currently in the DEVELOPMENT section, I believe that hardware/drivers can be added as a section, or at the very least a better description and including clarifying rule to well thought out exceptions and expectations. Features of CURRENT could remain in the existing section. I believe that DEVELOPMENT should include when something is troubleshooted about CURRENT, but not be limited to CURRENT. It would be about the hardware itself, and it would be allowed across CURRENT, PORTS or if it makes its way to STABLE. The topic would be about drivers/hardware.
My expectation would be:
Does this hardware work on any FreeBSD?
I at the very least know how to use ports and how to install a basic system.
I tried it on STABLE first, but it didn't work there so I tried it on CURRENT. or I read it was only supported on CURRENT, so I started there.
Then, while it's about CURRENT, the topic isn't about CURRENT itself but the status of a driver/hardware.
The people on it are able to submit to the mailing lists, and preferably file bug reports.
Then, because the expectation is that there's no guarantee it will make it to STABLE, someone can update, oh, it didn't make it to STABLE. Now everyone knows, and everyone knows the expectations, and there's no guarantee on the hardware drivers.
This is the kind of topic that has been done with graphics cards, and I already see can happen with multimedia keys on the keyboard. There may be some interest in this for newer storage drivers.
All supported versions of FreeBSD plus CURRENT are moving targets. CURRENT may be the fastest moving target so limiting topics to it is discouraged. It's about which features stay or are around the longest.
I see a plus where a developer can ask others on the forum to try out a hardware driver on STABLE or even CURRENT, or on a supported RELEASE where the driver is built from ports. Then, they report back their experiences on the mailing lists, bugreports and forums as long as they are relevant and helpful.