An example.
Ballyliffin Old, as a local once said to me, "made by one man with a mower", and the newer Glashedy course, "made by a bunch of men with big machines".
The former has a multitude of humps and bumps and hollows and ripples and uneven stances and crazy bounces. The latter has smoothed-out/graded fairways with hardly a ripple or uneven stance in sight. Whilst I like the Glashedy (except for the par-3 7th), especially the routing, I much prefer the Old.
Each to their own though.
atb