Ah, the web assembly target is for performance? I'm curious about the process of getting from 'let's put Stellarium on the web' to 'we're going to do a clean, pruned rewrite in C and spit out web assembly'. Like, did you sit around and think deep thoughts about various options? Or did someone look at web assembly and think 'huh, webassembly might be a neat way to port Stellarium to the web'.