I understand the convenience of 4 piece rods. I own 3. However I prefer 2 piece rods. Most rods I fish are 8 foot and under so no biggie. I like the ease of which you can align a 2 piece. Plus I feel they perform better. Maybe its not true, however I am a bit superstitious and stubborn. Bad combo.
I have always believed fewer breaks, or moving parts meant a more stream lined smooth performance.
Anyone ever cast a one piece rod? Hardy makes one. Not very convenient but I bet it's smooth.