Comment by Scharkenberg

While Win32 tends to deliver the most resource-efficient and responsive apps if the complexity is not high, I have settled on the latest .NET + C# + Windows App SDK / WinUI 3. Making an app look good and fit into the modern Windows look is extremely hard with Win32 C/C++ and writing and maintaining it requires energy that I'd rather spend elsewhere. Besides, modern frameworks are making great strides in speed, efficiency and QoL features. .NET 11 is full of optimizations, for example.