Always interesting when people as talented as Bellard manage to (apparently) never write a "full-on" GUI-fronted application, or more specifically, a program that sits between a user with constantly shifting goals and workflows and a "core" that can get the job done.

I would not want to dismiss or diminish by any amount the incredible work he has done. It's just interesting to me that the problems he appears to pick generally take the form of "user sets up the parameters, the program runs to completion".