Ask HN: Why Did ASP.NET Web Forms Die?

We have frameworks like Plotly's Dash that's exactly the same functionality-wise except built on React and WebRTC. So why did MSFT's ASP.NET not catch on? Poor marketing? Not open source?

https://softwareengineering.stackexchange.com/questions/95212/when-to-favor-asp-net-webforms-over-mvc