That last part is kinda tenuous. The important bits are already very prominent and well-organized. It's simply impossible though to have *every* piece of information that *every* member might be looking for at the top of every thread. Find a way to do that and become very rich.
Sometimes (all of us) can't find something easily when it's, in retrospect anyway, shouldn't have been too hard to discover. Well life. But yeah, what can be jb? The very first post in this forum i.e. the first post of the first (stick) thread at the extreme top of this forum has a neatly organized and up to date summary of what firmware versions for each device can be jb. Couldn't be much more prominent or easy to find than that. And the specific datum that you were wishing was easier to find is at the top of the 5.x Jailbreak
Wiki, as well as (at least) several jailbreak threads e.g.
here. And also shows up in other threads after a quick keyword search about what versions of firmware can be downgraded.
Sure there are exceptions, caveats, breaking news and things that only seem to apply during a full moon. Which is why we have a forum. If we hope NiLuJe finds a way to do something, I think take a day off and do something (else) fun should rank a lot higher than near-impossible, and IMO unnecessary tasks.