I don't recall ever seeing the topic.
Best is just to post the wiki article, as it can be edited easily enough (easier to correct errors than writing it from scratch); commenting can be done right there in the wiki "talk" page, as that is how wikis are designed to be used.
If all discussion about the article has to be done on other sites than the wiki, it makes it harder to have to go to one site (ES Forum) to discuss it, another (GD or ES Wiki) to input it or edit it or read it, another (ES Forum/etc) to research it, etc. If it can all (or most) be done on one place (ES Wiki), it would be easier. It also keeps the revision history of the article all in one place, as sometimes there is very good information left out of the final article that may well be applicable to some other article, or good to create it's own, and that can simply be copied over from that revision history or wiki discussion to another Wiki article.
FWIW: I typically can't access Google docs or vids or whatever, as the latest browser versions that I can use on either of my systems (for various reasons) are too old to be compatible with all their features. Since Google doesn't want to deal with troubleshooting, they just give error messages that I need to upgrade my browser and disable the whole page, preventing even viewing it. Some of their pages, like Gmail, have a "nobrowsercheck" function that lets me at least access the page, even if all the features don't work the basic stuff still does. I doubt most poeple have this problem, but some others probably do.
(I used to have a laptop that I could use newer browsers on, but it has a power connector problem that requires complete disassembly to fix (an all day job), and with two other working computers it is not priority enough to deal with, vs everythign else I have to do.)