When you are a consultant, you can't just learn a framework and then choose a place to work that uses it. Your clients will have their own needs and constraints that you're going to have to adapt to serve your client well.
The constant learning can feel like a freefall. Constantly feeling dumb is panic-inducing. There's this trough of despair in software, where you swing between feeling like a genius and then going right back to despair.
We can't just learn, but we have to learn well. It's critical to retain what you learned. Keep a developer journal, start a blog for yourself, discuss what you learned in a study group, etc. The less you have to relearn things, the less time you'll be spending in the trough of despair.
The dreaded technical interview tends to have the problem of not testing you on anything that you should be learning. You have to spend your time cramming and hoping that the interviewer gives you problems that are still fresh in your mind. A one size fits all solution doesn't work and doesn't end up being objective. Candidates should get the opportunity to show off their skill and what they already know instead of figuring out what they don't know.