alt Hacker NewsSo egui is great for projects where the application runtime is short lived, or for overlays in longer lived projects. The visual equivalent of scripts, where you know you need a small amount of immediate visual feedback and tweaking parameters for it to be useful to the end user.
Flutter answers questions about more robust UI.
It's good that you chose the right tool for the job and more people should know that there are options. But fundamentally I'm most motivated by the possibility of a robust UI framework made from first principles to be as low friction as egui but with the accessibility, performance, and visual flexibility of stylable retained mode guis.
Raph Levien and the xilem project might be getting us closer.
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If your UI is fast enough, why not in complex UI’s either? I’d say it gives you good motivation to keep your UI handling code as fast as possible.
Both approaches have their downsides and, in my view, retained mode and immediate mode tend to converge as the UI complexity increases. So far, no problems with implementing any UI I want in my experience with egui on a somewhat complicated application (Desktop word processor). Immediate mode is a breath of fresh air from React.
[Edit: although the standard accessibility criticisms apply to my application; although that's more of an issue with my implementation than an indictment of immediate mode generally.]