We are a small company and the techies use Skype mostly for chats and group chats. Previously used Google Talk, which was more lean and mean (despite not having group chat).
So I hope Skype is also not on the downhill.
Get the whole organisation onto Twist instead.
https://twistapp.com/
It's like Slack but better. The free accounts have pretty much all the features other than unlimited storage, so you can have a trial run for free. Excellent apps for Windows, MacOS, Android and iOS and a decent web app. Even covers instant messaging.