Tin cans and string are more intelligible than Lync, aka "Skype for Business". It's the worst thing I've ever used in this space, by an absurdly large degree.

I received a Lync / Skype for Business invitation (in G Suite - AKA Gmail) with no time and date, which a URL (custom domain for this company). Clicking on that link, dead link... (later on it was fixed but asked me to install add-on, did it in a Windows virtual machine, join meeting, meeting expired...)

Ridiculous experience, worst web conferencing service I have ever used (I consider it even worse than Oracle Beehive Conferencing - not many people know this). In contrast, WebEx is way better (phone dial-in quality is pretty good).

Oh gawd Beehive. Is it still alive? Why did Oracle ever think they should get into groupware???

I believe Oracle is still using Beehive Collaboration Suite https://stbeehive.oracle.com (conferencing as a part of the suite) internally, for email (thunderbird is the preferred client WoW), calendar (CalDAV) etc.

Beehive Conferencing used to be the default option for remote web conferencing (it actually has a better Linux version than WebEx). Beehive's predecessor, cannot even remember the name, use to be Windows ONLY and crashes attendees' Windows (BSOD) randomly (15-20%...) LoL