I was recently able to build a 3d software rasterizer and streaming web service using .NET6 and I did not have to consume a single 3rd party dependency.
Even things like SIMD-optimized projection matrix calculations can be found in the box (System.Numerics).
There is obviously the Microsoft aspect to this equation, but I feel like you should at least try the porridge before throwing it away. The empire has a hell of a Death Star these days.