Modern web apps are so much more inferior in certain areas when speed, immediacy and efficiency is required. They do have their upsides but more often than not, it is just a mess. I recently logged into my medical insurance website and the fucking thing ajaxing all day and I have no idea what part of the page is waiting to load. I don't have a speedy internet connection. I actually prefer the page to refresh than some small segment of it reload without any indication. Sometimes spinners are fixed in place to indicate "loading" but it is just a frustrating thing to look at.
I've used IBM AS400 and a bunch of factory management software - it is an absolute pleasure to use. Yet, most operators on the factory floor complain "We are just stuck with this old archaic system". Every single day. I feel like one of these days some asshole consultant company is going to convince our upper management for a web-based MRP.
Large percentage of people do not appreciate old pieces of software. They look at the aesthetics of it and write it off. I really think an average joe off the streets can be completely bedazzled by a modern React app with animations and frivolous bells and whistles that takes 5 seconds to load. Joe does not know the difference between aesthetics and functionlism. Jill on the other hand is a linux aficionado and goes out of her way to make things hard. Spends ages perfecting her vim config file, and looks down on anyone that doesn't use Arch Linux and some form of a window manager.
Perhaps there is a sweet spot between Joe and Jill's philosophy towards useful, easy to learn and efficient software that doesn't require an obsessive linux nerd to use. Like WordPerfect 6.2.
The world is really a sad place. :-(