I know that, other sims can link in DLL’s, but in MSFS it will at least require Wasm (web assembly) translation, that is working via CPP in a sandbox… I “tutorialized” an SDK example here when I started out with SDK … how-to-change-a-compass-sdk-gauges-aircraft-example but MSFS supports some kind of CSS+Javascript method too… that makes development a lot easier than CPP, but it comes with a cost. Even Wasm is much slower than native CPP. In a way you’re looking at a very complicated web page, allowing you to navigate instantly left, right, up, down and everything has to be shown (synchronized) real time. A browser needs big time for that, if you compare it to refresh rates in MSFS…