Shooting into the dark here. Maybe you’re demotivated because this isn’t really learning, not in the real sense. The difference between Vue and React are almost arbitrary. It’s like Python vs Ruby or C# vs Java. There’s details that are interesting and useful sure, but most of it is boring. It’s entirely horizontal.

What I suggest, because it works for me, is to focus on the layers above and below. Above you find high level decision making, design, information architecture, visualization and so on. Below you find protocols, runtimes, browser/os internals and interfaces, distributed systems and much more.

All of the mentioned things are vast and interesting. And there’s much more. You work primarily on frontend, how solid is your math? Graphics programming?

There’s so much stuff that is genuinely useful, interesting and has a much higher impact that keeping up with library ecosystems.