I see a lot of frontend devs these days who remind me of the interview horror stories about enterprise C++ guys getting a question like "how would you pull 10,000 phone numbers in NNN-NNN-NNNN format from a gigantic HTML page?" and responding by laying out an architectural plan for a hulking >1kLoC monstrosity, because they'd never heard of (nor could they imagine) grep.

On the other hand, obscene overengineering is probably a good way to build a portfolio. Nobody will get hired for demonstrating that they can build an HTML form on a static page.