Thanks, JH. I thought you meant that there should be a Proboards forum, period. Of course it would have been nice if the Duolingo powers that be had a back-up plan, but since they didn't... two things occurred:
1) The Life & Language forum was already in operation for over a year by a 'regular user' on Duolingo--me. Duo mods could have created a Proboards forum and it could have taken off. But when I advertised the link, I had noticed a few users badmouthed L&L for false information about Proboards to mask their disdain for either me or L&L (ie. "not safe", it was "technically not accessible", etc.). If they say they felt that way about Proboards, they would have had to equally feel that way about any Duo-mod created Proboards, correct? Can't have it both ways.
2) Duome's Forum was created the day of the closure announcement. Duome provided a natural transition for users who wanted to feel the Duolingo connection. Duome offered Duolingo stats, contained the Green Owl mascot, so it made sense that users automatically felt a sense of familiarity. It quickly blossomed and it seemed that people preferred to build a home of their own, and to make this forum the place they wanted all along. Many people who resented Duolingo's decision began to feel at home here, and became used to the interface, even preferring it.
It didn't leave much unless people were prepared to spend real money on a forum hosting site like Ning. And if that were the case, users would be solicited to spend their money to cover the costs. Since that wouldn't happen... I conclude with:
3) (This is merely an assumption) The Discord forum is supposedly operated by "the amazing Duo mods" because of...pride. Am I wrong? If I am, then why aren't most of them on either of these two forums, that most people went to? Odd, since Discord links were often downvoted and posts deleted about them concerning safety? Talk about chatting-galore with minors!--something that Duolingo worked hard at preventing. Most of the Duolingo mods have chosen not to create accounts on Duome or L&L. I only see maybe 2-3 recognizable names on either forum. DaKanga being the exception of transitioning from Duo mod to Duome mod. I found that very strange. They either didn't join, or are using new usernames. Weren't the Duo mods users who also were once regular users themselves enjoying the fact they could connect with others? If so, why not now? Therefore I am assuming pride. In my opinion, if that's the case, that is not what the spirit of language learning is about.
Personally, I have always welcomed the mods from Duolingo to join L&L when I was linking it, and even extended an invite to Kevin and the Admins both publicly and in a private submit-report message (when I was trying to appeal my shadowban). Anyone who hasn't yet joined, they are still offered an invite. Being a regular user after being a mod shouldn't be that hard of a pill to swallow. I know, I've swallowed many a-pill myself, and did it because it was the right thing to do. We're here for the same purpose, are we not? This is why I believe in both of these forums, and continue using Discord for gaming.