Forums have enough of a turnaround time that it can take days or even weeks to schedule something that
could be scheduled within minutes or hours, or could even be done as an impromptu event whenever the DM feels like it. Remember that time Ilhara started spamming Morex with Sendings? We're in the same timezone, my open timeslots are basically immutable outside of emergencies or other special circumstances, and it still took
days for us to agree on when we should play it out! (Even then, it was only because you decided to break your no-Discord rule and poked me about, IIRC, doing it basically right then and there.)
Or the final chapter of the Rockrun campaign, for that matter. Despite being scattered across both sides of the Atlantic, it took us only what, a day and a half to arrive at a schedule for the whole thing in Discord? If we'd kept it on the forums, odds are I wouldn't even have participated in the scouting mission on Thursday, because it wouldn't have
been on Thursday, and by the time we'd finished collectively processing the implications of my company trip, the only timeslot we could all agree on would have been
after all the illithids were dead already.
Compare and contrast with Nelee's request now. Over the first 10 hours since he notified me he'd be taking it up, Honk and I have already performed at least a half-dozen PMs' worth of casual back-and-forth conversation about when we should do it, and the biggest slowdown has been due to the fact that most of the people that
might agree to accompany Nelee weren't available in Discord. (Most of those were, at least, available IG throughout the day, which considerably reduced the time it took for me to gather their scheduling data.)
This isn't even limited to DMs, either! Arranging interactions with other players also goes a lot more smoothly in chat, because although the
worst-case response time is comparable to forum PMs, the best-case response time is virtually instantaneous, and reality often tends to align with the best-case scenario if there's any real hope of finding a timeslot that works for both sides.
Edited to add:
There's two more points you're glossing over here:
- Chats are not incapable of depth, and forum PMs do not guarantee it. Just before writing this post, I embarked upon as thorough an explanation of how the server's changed over the past few years as my memory permitted, in #new-player-questions. Aside from the lazier formatting I use in chat, that explanation would not have been inappropriate as a forum post. (Better than a forum post, though, is how the reader could have interrupted me at any point to ask for more clarification on any of the things I was explaining. With forums, you either need to pray you've correctly guessed what is or isn't relevant, or write boatloads of redundant or otherwise unnecessary information in order to exhaustively cover all the things that could be relevant.)
Meanwhile, I've often exchanged series of PMs with players and DMs alike because the original PMs didn't cover all the bases, or because of a misunderstanding that rendered them invalid.
- Even if this wasn't enough to convince you that chats do have some value for scheduling, it's a moot point, because Avanos' proposal isn't about scheduling in chat. It's about scheduling with calendars. He aims to reduce the use of both forums and chats alike, by occasionally letting the players go "okay, the DM thinks they're going to be free Tuesday evening, which works great for me, so I'm gonna see if that's okay" instead of "sure, I'm available every evening in the week, but I have to check when the DM is going to be available".