Okay I bought some cheap pedals to play DCS, Star CItizen and IL-2.
After testing them for 2-3 hours I don't know how I could ever play without them. After the initial learning phase you get so much more control and it feels a lot more immersive.
But yeah the internet is right, pedals is the last piece of hardware you should buy. First of all get a stick and throttle, followed by a headtracker.