I loved silverlight. Before I got a “serious” job, I was a summer intern at a small civil engineering consultancy that had gradually moved into developing custom software that it sold mostly to local town/city/county governments in Arizona (mostly custom mapping applications; for example, imagine Google Maps but you can see an overlay of all the street signs your city owns and click on one to insert a note into some database that a worker needs to go repair it… stuff like that).

Lots of their stuff was delivered as Silverlight apps. It turns out that getting office workers to install a blessed plugin from Microsoft and navigate to a web page is much easier than distributing binaries that you have to install and keep up to date. And developing for it was pure pleasure; you got to use C# and Visual Studio, and a GUI interface builder, rather than the Byzantine HTML/JS/CSS ecosystem.

I get why it never took off, but in this niche of small-time custom software it was really way nicer than anything else that existed at the time. Web distribution combined with classic desktop GUI development.