Moreover, most mobile apps, web or native, could suck A LOT less if they did just that, load all the data at start. I have taken that to the extreme of serving

Moreover, most mobile apps, web or native, could suck A LOT less if they did just that, load all the data at start. I have taken that to the extreme of serving all the code and data in one file. Definitely will do that again if I ever make another app with similar and fairly common constraints. Never waiting for unstable network and zero bugs with some part of HTML/CSS/JS/data missing or out of sync is pure joy.