> There is no mocking of concrete implementations

That's an obvious anti-pattern in the first place, especially when you know the optimizer could inline hot code and optimize the function out.

> Everything feels a lot more corporartized or tied to Microsoft

Remember J2EE and the confusing javax stuff? They're the same and fortunately both are waning out.

> The open source ecosystem and tooling around C# isn't to the same level of the JVM

Isn't that because of the open source community's refusal, rejection and resistance against Microsoft? Not only open sourcing is a first mover takes all, but specific to Microsoft they have been known to be hostile to open source in the past, most prominently one of the former CEOs of Microsoft blatantly called Linux cancer and what do we have today (https://www.theregister.com/2001/06/02/ballmer_linux_is_a_ca...)

Also, it is very well known Microsoft tried to spread FUD in the past in order to kill Netscape Navigator and tried to kill Java until it is almost being antitrusted to the extent of Baby Bells (https://en.wikipedia.org/wiki/Breakup_of_the_Bell_System?wpr...). Still Microsoft is not friendly nor hostile towards open source given that they let Mono lived, despite using Microsoft's trademarks and patents (you heard me right, dotnet has several patents and ECMA standards before!)

It's not like we dotnet people don't know the past shady shit of Microsoft, but I do believe in a convicted criminal could learn from the past, correct itself, move on from the past and be a better person off the record in the long run.

It's like a big bully tried to beat off a skinny nerd but now the nerd is as big as the bully now, and all of a sudden the bully found its conscience and begged for apology. It is natural for the nerd to not accept it in the first place. Except when both are nerds and the analogy may sound kinda odd.

But I also do understand not all people thinks like that especially for the open source community who is wary of Microsoft may attempt to commit a FUD to the open source community and they do have their memory and thus reactions, I don't have any means to control it. In fact most ordinary people would still choose to reject a convicted criminal in their community instead of accepting even if they have stopped the behavior, because it is a social stigma that indicates this person is of high risk

And contrary to Java world, the Oracle situation is getting more and more heated due to its predatory licensing agreement and people are flocking to other Java distributions. This could tear the Java ecosystem apart because it is the .NET Standard situation again and I'm pretty sure histories repeat. By the way, fragmentation is what ultimately killed MIPS and I think RISCV is on the watch.

Alas, time as always will tell, just like it's either hit or miss. We should look for a longer vision and see how it shaped out in the futures.

> The project structure feels odd

No it isn't. It's the multiprojects structure of Gradle, although I'm not sure if you ever heard of it in the first place given your reaction. In JS ecosystem this is aka monorepo but this means .NET Ecosystem actually have monorepos for almost the last two decades!