Adobe describes it as a port https://web.dev/articles/ps-on-the-web#webassembly_porting_with_emscripten https://web.dev/articles/ps-on-the-web#webassembly_porti

Adobe describes it as a port https://web.dev/articles/ps-on-the-web#webassembly_porting_with_emscripten https://web.dev/articles/ps-on-the-web#webassembly_porting_w... largely because most of the work in doing so was not related to the updated UI front end. As such, the use of Web Components is just one section of many notable things.