For instance, I currently have four raspberry pis online: If you're like me, you instead want to dedicate your raspberry pi for a few specific tasks. No offence, but I'd never use a raspberry pi to run such applications, rather a proper laptop or desktop. LibreOffice, Mathematica, and even more useless stuff.
You end up with software that you don't need, e.g. That being said, I never use this method because If you've never used a raspberry pi before, maybe you want to give it a try.
So easy that this method is advertized almost everywhere. Install raspbian on a raspberry pi with NOOBS Today, you'll learn how to set up a raspberry pi with the software you need and nothing else in less than 10 minutes!