I can't stand this mentality, but here is a list of reasons:

* ECS is built in, not tacked on (unity DOTS)

* Also supports unity/ue actor model style

* Gives you complete control over rendering, access to opengl/vulkan/d3d12 context

* Built in scene streaming (stream objects in and out as needed, similar to UE5 terrain chunking

* Fully built in C#, runs on .NET 5 (xplat), and uses the latest version of C#. I don't know which version unity is stuck on

* The "engine" is just a tool, you can use stride as a framework and make a code-only project (my personal reason for using it when I do)

* MIT license

* Aysnc scripting capabilities

* Technically supports dev on linux (code-only)

* FOSS

* On top of all that it was developed by Silicon Studios, a company that actually makes money off of real-time rendering