Yes, your not alone..
...I hadn't heard of it either.
I came across someone on another forum that tried it, twice, and the summary was, it was terrible.
Microsoft has spontaneously and ephemerally killed GigJam, a collaboration tool it billed as empowering “people with a co-working mindset” to “spontaneously and ephemerally involve others in your work.” Redmond only revealed the GigJam preview in June 2016, promising it would soon become a new member of the Office family and …
Hipsters (usually millennials) working in marketing and IT, of course.
The same brilliant folks who came up with the Metro tile interface.
And the Skype revamp of 2017.
And the 'friendlier' BSODs and error messages in Win10.
And the obsession to be another Apple when it comes to having an 'app store' to be the gatekeeper of Windows programs. Refer to the recently announced Age of Empires 4 game: exclusively for Windows 10 on the Windows Store. Walled gardens are so hipster-friendly!
It's a malaise, we need fight back and have some revolution, restore sensibility to this madness.