The ReactOS free software project is turning 30 this year and its “open-source Windows” OS ambitions remain. They are starting out this year with another “major step” towards Windows NT 6.0 compatibility.
ReactOS developers shared that after months of prep work, their MSVCRT implementation in ReactOS has been synced against the Wine 10.0 state. MSVCRT is the DLL as part of the Microsoft C Runtime library.
Maybe it can help getting software to work that would otherwise only work with older Windows version, eg: software for scientific equipment.