[throwawaysea]

Powershell was actually a one-man project. It was originally code-named Monad. See https://devblogs.microsoft.com/powershell/monad-manifesto-th..., which contains a link to the original "manifesto" written solely by Jeffrey Snover.

Monad was available in various early stages internally within Microsoft and externally to the world, before it eventually became a feature with a whole team behind it.

Snover, by the way, is a Microsoft Technical Fellow (their highest title for engineers): https://en.wikipedia.org/wiki/Jeffrey_Snover

This is a very different example than the effort behind the EHT, which includes not just those working on imaging and reconstruction, but numerous others as well. The total team has been said to be ~200 people. Furthermore, even on the imaging side, there were several papers and several different reconstruction algorithms to fill in gaps in sensor data. And those papers themselves reference numerous prior work in this space, upon which these newer algorithms are evolutionary improvements.