My own game is developed with Linux : the content guy is on Windows (personal preference), the code guy on Linux (personal preference), we both have experience with both systems and we’ll ship on both systems.
After two years in development, we only found small differences between both, outside of the launcher obviously. Small differences between shaders on float precision, C++/HLSL warnings on one system that don’t exist on another, and lesser performance on Linux. Some time ago there was also a different mouse & focus behavior on Linux.
Honestly, Linux support is far from being bad.