> The Unity engine has evolved a lot in modern days, but I noticed a trend where Unity developers are still using "outdated" techniques when writing their C# code.

Some years ago I tried to get into C# + Mono. Eventually I opted for Java instead, for many reasons; I'll skip that here.

C# is very strange to me. In a way I feel that C# belongs like Java in the same "post C++" family; C kind of paved the way, C++ was messy and powerful, so Java and C# would be more "managable". But I never got into C#. Java is not a pretty language, it is also quite boring, but modern Java is somewhat acceptable - you get the job done. And it is not an extremely difficult language either for the most part, just with an addiction on pointless verbosity. C# is ... strange though. TIOBE has it ranked #5 right below Java, so there must be many C# users, but I don't get to see them really in the Linux ecosystem. So where are these people all? Using Windows only? When the question is "most developers don't use feature xyz", do all of them actually KNOW these features? You can still find many java tutorial where people use archaic ways to, for instance, iterate over a collection. Perhaps it is similar to the C# ecosystem, people are slow to adopt. Or, and this may also be a reason, people could have moved to other languages. This may not be a huge percentage, but you see that some languages suddenly struggle with old devs and failing to get new devs (ruby is in this problem right now; it may overcome it but right now it is sinking hard, even though I would reason that the language is, for the most part, better than it was in, say, 2010).

C# has had the reputation of not being viable for Linux for a long time. Therefore, the people already on Linux didn't have a reason to use it or even try it. If you're already doing stuff in other languages it's hardly worth it to switch to C#.

I personally use it quite a lot - but I came as a windows user writing all my utilities in C#. Also, afaik C# is mostly used in corporate environments that don't open-source their projects. You're unlikely to hear from it unless you're working on it for this very reason.

C# has a unique powerful position in the video game space. In almost every other niche, there are better (or just trendier) solutions, but C# is the only major language that actually gives you a combination of features that are important in video games:

- Dynamic runtime with loose coupling and hot reload of code - extremely useful during development.

- Value types. You don't want every Vector4 to be heap allocated when you're doing 3D graphics, because that's going to be absolutely unusable.

- Access to a relatively low-level substrate for basically-native performance when needed - extremely useful when you're trying to actually ship something that runs well.

Taken in isolation, C# isn't best in class for any of them, but no other language offers all three, especially not if you also want things like a really good debugger and great IDE tools.

To my knowledge, Java has none of these features (yet), and they aren't really important in a lot of the areas where Java is popular. But this is why C# in particular is very strong in the video games niche.