It does look dated, but I use it daily (I use the xfe file manager) and it is bloody quick - every action is almost instantaneous compare to the KDE, gnome, mate or cinnamon file managers.
It depends on the target market for your application I suppose - if your target won't be happy unless they have html/CSS or similar animations, then using something with low latency isn't going to make them happy.
Personally I don't mind the Windows 98 look, it strikes me as clean and no-nonsense. Everything is clear and high-contrast. Unlike with many 'flat' themes, it's generally clear what's clickable. I realise not everyone likes the Windows 98 look though.
If someone is serious about developing fast GUI apps, trading off on themeability is the kind of thing they should consider. As you say, FOX really is fast. I presume this is because of its uncompromising hard-coded native-code-only approach - it's just a C++ codebase. All the drawing operations are implemented directly in C++. Unlike Qt, there's no JavaScript. Unlike JavaFX, there's no CSS. It's all just C++.
Perhaps a GUI toolkit could add themeability without any performance impact by implementing it as a compile-time abstraction.
> depends on the target market for your application I suppose - if your target won't be happy unless they have html/CSS or similar animations, then using something with low latency isn't going to make them happy
Right, but mattgreenrocks said fast, focused, and respect the user's time and computing resources, presumably in contrast to current norms.
It depends on the target market for your application I suppose - if your target won't be happy unless they have html/CSS or similar animations, then using something with low latency isn't going to make them happy.