Got to milestone 11 before I had to stop. Towards the end 99% of the time is spent just picking up nodes. There NEEDS to be a way to automate this. Once you get the perk to ignore downsides there really no real thought behind picking a specific optional node so I was just rapidly clicking every single node I could and it still took a year and a half. There's also not much else to do besides just clicking on things.
Maybe I didn't look hard enough, but I don't think the paths really mattered much. I mostly did the cooking one and did cheeseless pizza since it was pretty easy, but I did dip into the other ones and didn't really see why I would pick them since I felt the first one you unlocked gave you as much income as any of the other ones you did with a lot less effort.
Fun game over all early on, but rapidly gets tedious and repetitive with no real new mechanics to keep you engage. I really do wish I can 100% the prestige tree but it's just to boring at that point (probably need 2-3 more resets and I'm done) and I have Carpal Tunnel so can't really force myself through it