On the other hand, it should be possible for software to be done. I have never used Evernote, but I am not sure how much innovation is required in the note-taking space.
Their 'new' client software (Electron-based, of course) never even achieved feature parity with their 'legacy' client software. The mobile app wasn't exactly screamingly performant, to put it nicely. Really basic core use cases, like creating a note, typing in a title and some content, tagging it with a keyword, and saving it, required a lot more clicks than it seemed to me like it should. Hierarchical tags, while technically supported, seemed like a weird add-on that never got full support. And Penultimate -- their tablet-centric app that stored data in your Evernote account -- hasn't been updated in several years; I'm actually impressed it continues to work.
There's plenty of room where they could have built new features, if they'd wanted to. Off the top of my head, I'd have liked to see Markdown support instead of their quasi-HTML WYSIWYG editor (some versions of the thick client had a subset of Markdown-like syntax but others didn't). Penultimate would have been great if it had on-device OCR / handwriting recognition, or even just a way of tagging specific pages or page-regions with keywords.
I think there's a lot of room in the notetaking space. I'm still waiting for an app that isn't a glorified text editor or a drawing program, but also doesn't lock your data into some unparsable binary format or obscure graph database behind the scenes. I want to take notes, using a pen, on a tablet, that might or might not be text, and then I want to annotate the shit out of those notes and keyword them and cross-reference them, and I want the whole thing to be searchable and I want the handwriting recognition to not suck, and I want all of this to be encrypted at rest and in transit, and I want native clients for all major desktop and mobile operating systems.
So, yeah, I don't think notetaking is done quite yet.
And the limited depth of notebooks has always been just wrong, which is why I use hierarchical tags.
Hardware gets better so UI gets more glittery, everyone tries to "stand out" by looking/working best, so the UI "taste" changes. Or hardware form factor changes, so everything needs re-written to support it, etc.
Next hardware re-write will be some mix of AI/low power. None of the "green" energy stuff will deliver in time, nuclear won't happen in a way that is both safe and any-time-soon, and meanwhile power-hungry AIs will be battling for cpu cycles and watts with other devices.
Your devices will be very low power and the majority of modern software will be laughably ill-equipped to handle that. Or it will run on giant mainframes that look nothing like x86 desktops or even server farms, more like specialized super computers.
Not if you ask product managers