Yeah my company has the worst time with Skype, but nobody takes you seriously if you mention Discord even though it’s much more reliable and has more features.
What enterprise support plans exist for Discord? Is there a support person you can call if something goes down during a business-critical timeframe? Can HR or other staff access chat logs of their employees? If so, how far back do the chat logs go? A day? A month? Forever? How long will it take to train staff on using this software? Some people get really freaked out by a new UI - they don't think about what they're doing, they just memorize button clicks. So if you change from Skype to Discord, they need to re-memorize the button clicks / patterns / flows, which can take weeks. Some employees really are that slow. Does discord work with existing VOIP phones the company has purchased? Or will those assets need to be retired early due to not being compatible?
There's more to choosing enterprise software than just the features and reliability. My guess is that Skype was included for free in an existing Microsoft contract (Windows 10 PC's, or Office), whereas discord would require an entirely new contract.
Teams is pretty good (and I suspect partly ripped off from Discord), but I don't believe it has the casual voice channel feature the parent wanted. You still have to manually initiate calls, like with Skype.
There's more to choosing enterprise software than just the features and reliability. My guess is that Skype was included for free in an existing Microsoft contract (Windows 10 PC's, or Office), whereas discord would require an entirely new contract.