Rules Version 3 vs Rules version 4

[Blackcloud6]

I play everything with the 4th Edition as written.  I've thought about the old rule of hills being limited terrain and applying it in the older games but frankly, have never done it.  It does not seem to matter although I've never played it one then went back and played the same scenario the other way to see.  But I get a sense that it does not change much.  You might get to do an artillery or airstrike onto a hill using the 4th Ed rules where you wouldn't in the previous editions.  However, I think the overall effect is minimal.  And, to me, being able to do so such strikes is more realistic as one might fire on "suspected enemy positions" which you cannot do in PG due to the requirement to spot.

And I have enough wargame rules smashed into my brain that I don't want to be looking through the old drawers in my head to see "was that in 3rd or 4th Edition?"