Documentation!

Writing reference documentation (like a man page) is something programmers do well. Writing concise (as in contains few redundancies), complete and unambiguous explanations is what most programmers do naturally - and it normally comes easily to them regardless of the language - C or English. I suspect this is why the man page system is one of the best sources of documentation around. There are notable exceptions of course - like the sudo man page, but even that manages to be clearer than some ISO specs I have read.

HOWTO's and tutorials - well rusty seems to have a remarkable talent for it, but he is the exception rather than the rule. The best HOWTO's seem to come from the users.

I see below you are talking of adding nftables as a classifier. This is even better news. It is a way of evolving the mess we have now into something sane.