Tags work–I don’t really mind what mechanism is used as long as its a way for users to filter and sort by their topic of choice/interest.
With all due respect, I don’t believe the vast, vast majority of new/prospective Qubes users don’t have knowledge of what networking, display, audio, hardware are. The rest, like Xen, Salt, distro issues are slightly more advanced tags, but not frighteningly so.
As noted earlier in another thread, people have been misclassifying things likely on purpose to get attention (e.g. posting questions under ‘Guides’, which is obviously wrong). The fact that this is happening is actually a symptom pointing to the need for better sorting/filtering.