Even if, as WotC says, that the majority of the community conversation is taking place elsewhere, I suspect a sizable amount of it was happening on the company's forums. This is simply cost cutting, plain and simple, but I suspect part of the cost will be a loss of traffic to the WotC site.
Instead of trying to build a community, they'd rather cut it loose.
I know few if any of The Tavern's readers frequented the WotC forums, but it's still a shame to see them shut down.
When they should be looking to build up their loyal gaming community, they end it.
Tenkar's Tavern is supported by various affiliate programs, including Amazon, RPGNow, and Humble Bundleas well asPatreon. Your patronage is appreciated and helps keep the lights on and the taps flowing - Your Humble Bartender, Tenkar
Tenkar's Tavern Discord Server Events - link - https://discord.gg/fReGmuD - Click to embiggen