Pick the right technology to solve the problem you're trying to solve.
Some inexperienced devs just try and cram every single technology they've ever heard of into a simple project when it's not needed. You're not at Facebook's scale just yet where many of these abstractions are anything other than an extra complication and a waste of time and future liability.
Your average simple website for a law firm, bike repair shop, or a pizza delivery place doesn't need 93 different libraries/frameworks/technologies/build systems/etc to show/hide a couple products or submit a form or two. You can go pretty far with just jQuery in many cases.
It gets a little more complicated as you go from simple site to more complex site to app to more complex app, but I see too many developers trying to be trendy and over engineering simple problems and wasting a lot of time and money.
jQuery had it's time. Now you just use "vanilla" JS and it is enough. No external dependencies for your landing-page / non-web-app site.
Yes, "you might not need jQuery". But, the first time you have to log real hours fixing a cross-browser bug that the jQuery team already took care of, I'm fucking firing you. Choose wisely.
"If you make a mistake try to cover it up rather than be honest about it, because your arse is on the line".