I'd argue that it's overkill. Simplicity of solutions is a virtue and a good employer recognizes that. On the other hand, there's always fun in doing something

I'd argue that it's overkill. Simplicity of solutions is a virtue and a good employer recognizes that. On the other hand, there's always fun in doing something stupid and impractical, like porting DOOM to a smart appliance. So instead of making a portfolio with React and SASS, try doing something else that more clearly projects "I know this is overkill, but it's weird fun so I did it anyways."