One reason might be that the tools have telemetry (i.e., automatically gathering and sending data about your system and your use of it to Microsoft) enabled by

One reason might be that the tools have telemetry (i.e., automatically gathering and sending data about your system and your use of it to Microsoft) enabled by default[1], which is unexpected and off-putting to people in the free software world. It seems to reflect a very different attitude to some fundamental cultural values. According to the comments on the issue tracker, it was supposed to be OK because it was anonymized – but oops, there was a bug, so it wasn't totally anonymized. But it's OK because you can disable it if you happen to know about it – but oops, the disabling mechanism had a bug. Things that are important to many free software users are not important to Microsoft. I was excited about .NET Core until I became aware of this stark misalignment of goals and priorities. [1] https://github.com/dotnet/cli/issues/3093 https://github.com/dotnet/cli/issues/3093