@robfallows, thanks for that.
Now I remember, Github is the company behind both Electron AND Atom – and Electron is the platform Microsoft build VSCode on.
On 11 April in 2013, Electron was started as Atom Shell.[9]
On 6 May 2014, Atom and Atom Shell became open-source with MIT license.[10]
On 17 April 2015, Atom Shell was renamed to Electron.[11]
On 11 May 2016, Electron reached version 1.0.[12]
On 20 May 2016, Electron allowed submitting packaged apps to the Mac App Store.[13][14][15][16]
On 2 August 2016, Windows Store support for Electron apps was added.[17][18]
Interestingly, if you go to the Visual Studio Code wiki page, VSCode IS actually built off the same editor component (“Monaco”) as Github’s Atom:
“Although [VSCode] uses the Electron framework, the software does not use Atom and instead employs the same editor component (codenamed “Monaco”) [as Atom]”
Also, if you go to the Electron website, https://electron.atom.io/, there’s an impressive list of apps built on this tech – some of them I actually use often. And one of them, Electron based Beaker Browser https://beakerbrowser.com or https://github.com/beakerbrowser/beaker – looks really cool. I can see Beaker Browser being useful when trying to create demo/example webapp projects and the like.