I live in Europe, and we are about to hit an energy ceiling. It is possible that energy will be limited where I live, so compiling shaders at home may not even be possible.
Now, if there was like a shader farm, with limits per user and definitely pay to compile for heavy usage, we would only compile them when absolutely necessary. This will minimise pollution.
There is also the idea of cheap shaders and lighting, like a super cheap mode, where you have 512x512 textures, flat lighting, no shadows, like PS1 games fx.
If you do not plan for this, UE5 may not be an option in Europe until few years from now.