Yeah, Discord not going into competition with Slack or Teams has been an own-goal that I've been baffled by for years. Given that Slack apparently thinks their incredibly subpar offering is worth $200k a year, I can't imagine why Discord wouldn't roll out a "We'll run a standalone instance of Discord with your information siloed and DMs retained for legal purposes, with full Nitro/Boost perks for $ALOTOFMONEY/user" version of their software.
It's quite fortuitous Discord never went down this path you've outlined. "Concord" is now a term synonymous with abject and astounding failure. "Unity" is also taken and fraught with negative associations. "Harmony" might be free.