As a rule, the old wiki for RouterOS 6, and the new help site for 7.
Rarely, something hasn’t been moved over to the new site yet, so the wiki will end up more helpful with v7. The incidence of this can be expected to drop over time.
I personally would love it if they enabled a feature to download an offline copy of the whole help site. I know you can single pages, but who really wants to do that.
That horse is already out of the barn since a long time.
As much as I like the ability of offline content as well, most companies use online nowadays. Some even don’t give you a simple manual anymore.
I do remember the times when being always online wasn’t that common. Offline and paper manuals were the way to go then.
Remark: given the fact especially the help version is still being updated pretty regularly, online will be the best choice here.
…and I would kill for a book like we last had with version 2.9. It had 700 pages and was heavy as hell, but I religiously carried it around like a bible.
This is a really good suggestion, because it could help someone who wants to experiment with his router and have a copy of the manual just-in-case he will get “locked out” of the internet.