This is absolutely true.
I bought a new Tracker 175TXW 2 years ago, because I wanted a boat right away. Now I wish I would've waited and bought a bigger boat. The amount of money you spend on upgrading items such as electronics and trolling motor is a lot. And then there's the items I wish I could change like the live well size which is too small at 15 gallons, but would have to sacrifice other storage in order to do so.