If you delete the EGR and charcoal canister as mentioned in that thread, then yes you can get rid of most of the vacuum lines. I wouldn't advise deleting the charcoal canister, though.
That said, the other lines can be re-routed and/or combined to get rid of almost all those plastic under-plenum lines. I actually did this myself when I performed a 4-cyl to V6 swap several years ago. I ended up with only 2 under-plenum lines, one for the brake booster and one for the fuel pressure regulator. The PCV valve was relocated to the firewall-side valve cover, with a breather filter on the trunk-side. Below are a few photos. Notice that the EGR and charcoal canister were not deleted.
To get rid of the under-plenum lines for the EGR, I moved the EGR solenoid to the area below the intake hose. The vacuum lines from the throttle body went straight down to the solenoid. And the line from the solenoid ran up to the valve, which was nearby (you can see it in the photo above). This also provided a dedicated vacuum line for the MAP sensor, since the EGR solenoid was moved away from there. A T-fitting on the throttle body neck sent vacuum lines to the charcoal canister and fuel pressure regulator. And I think that's it.
P.S. -- the throttle body coolant lines were also deleted. I just used a short piece of hose to connect the two ports on the thermostat neck.
