Things have improved now with dotnet core and everything else, but it takes more than 2-3 years to gain acceptance and widespread use.
Core is a complete contrast. For a fairly boring CRUD web service, entity framework is a genuinely good O-R mapper and deploying .net core web services in a container is so easy it's literally childs play with the AWS toolkit installed in visual studio.
I get it that a lot of developers just don't think it's cool enough and that it carries a lot of the same dependency hell as Node (well, it's better than Node for that) but for my use case it's trouble free and allows a single person shop to quickly update and deploy an entire backend system without having to manage servers or licenses or anything. Microsoft do get money out of me via the Visual Studio subscription, but I needed that for other reasons so I figure it's a sunk cost.
You can't use the licenses for production systems but they sure are handy for spinning up replicas of on premises customer setups.
On the side I've been building a job listing site for tech jobs in Australia with .NET core, currently it's on a $5/m Vultr instance with a postgres DB. This wouldn't have been possible to do a few years back: https://www.headhunted.com.au
The reason is most likely that software is rarely delivered by installable binary. SaaS over the network as popularized by Salesforce is the prevailing method now. Makes it so much easier to deliver updated code.
I also suspect WASM to become more widely used than .NET at startups and more generally in web based applications.
I believe OP actually meant the development platform is very stable and keeps you productive and helps you deliver products, which is what startups should be about. Which from what I've seen is mostly true especially compared to something like JS frameworks.
That said, I still believe the ridiculous levels of vendor lock-in are not worth it.
But really who in clear mind would prefer to become a slave of MS ecosystem in webdev area in 21 century?
Only people who doesn’t know how to work with other platforms (or who got fooled by marketing/sales).
What's wrong with using .NET Core, which is open source and cross platform. Can't I create a ASP.NET Core application with Angular for front-end and deploy it in AWS as a Docker container. You are not necessarily becoming too dependent on the MS ecosystem.
This has changed since with the arrival of (ASP) .NET core which is cross platform and a very open framework. But with many well established Node.js/RoR/Java solutions in startups and enterprises alike, I believe it'll need some time to gain traction.