On the user's side: Just pick any set of well-established best practices such as Shneiderman's Eight Golden Rules or Nielsen & Molich's 10 Usability Heuristics, an then pick a typical 2024 electron app that has an equivalent from the 2003-2013 era and is written with a typical UI technology of the time (such as Windows Forms), and compare the two UIs with respect to those best practices. -- I'm pretty sure you will find usability blunders in today's software that you simply couldn't commit back then, even if you tried. -- Essential UI elements being hidden away (with no indication that such hiding is taking place) based on viewport size, leaving the user unable to perform their task is one thing that immediately comes to mind. Another example I happened to experience just yesterday: UI elements disappearing from underneath my mouse cursor when my mouse cursor starts to hover over them.
Also: Just look at the widget gallery in Windows Forms, providing intuitive metaphors for even quite subtle patterns of user interaction and check how many of those widgets you find implemented in modern web-based design languages and web component systems. ...usually you don't get much beyond input fields, buttons, and maybe tabbed-views if you're lucky. So today's software is relegated to using just those few things, where, 10 years ago, you had so many more widgets to pick and choose from to get it just right.
On the developer's side: Was JavaScript ever actually designed to do the things it's being used for today? Is dependency hell, especially in the web ecosystem, worse today than it was 10 years ago?
