I've been developing Java desktop app for more than 25 years. I think the problem of the early days was the start up time of Java and the fact that reflection a

I've been developing Java desktop app for more than 25 years. I think the problem of the early days was the start up time of Java and the fact that reflection and (de)serialization was causing too much security problems for Applets. Once the applications started, I don't remember them being slow. Hotjava (1995), JDK applets (1996) or Forte (2001). The fact that it doesn't look exactly like the OS is not I think a big problem for users. Applications like Google Chrome, Discord and Electron apps don't look native and nobody complains about it.