I am an under-engineer-er. The default lens through which I approach problems is one that prioritizes Less Code.
Usually the highest-leverage additions to your app are not complex ones, though having already increased your complexity surface area for nebulous ends or a distant vision will quickly make them so.
I am a student of Martin Fowler’s First Law.
I am also a strong believer that the documentation of any mature framework you may lean on inevitably proves an order of magnitude more comprehensive and approachable than that which your team may draft for any home-grown framework.