Switching this mindset might be one of your biggest potential game-changers and frankly something you should have done years ago. Over my life, I've gone deep

Switching this mindset might be one of your biggest potential game-changers and frankly something you should have done years ago. Over my life, I've gone deep down countless of such "dead ends". The same goes for most distinguished people I've worked with. Except they're not necessarily dead ends - syntax and APIs aside, so many concepts, practices and thinking can translate across. Ideally focus on first principles. Being comfortable with picking up some new obscure thing, getting up to speed quick, and then moving on to the next one after x days/weeks/months/years, is one of several distinguishing aspects of a veteran. That doesn't mean you should scurry around drilling down on random things for the sake of it, rather that a curious and fearless approach will naturally bring you there over time. Maybe set aside x hours per week for some small personal project where you apply new technologies to get familiar with them and the process. For example Laravel, or whatever else seems relevant or fun to you. Move on to adding on some new frontend library like React or Vue or whatnot. If nothing else it should make you feel more comfortable during interviews.