It really depends on what you're loading how many die stations you need.
For years I only reloaded bottle neck rifle cases, a 2-die operation, 3 if you count Dillon's built in powder drop. The 450 had 4 stations & I only used 3 of them so I was GTG.
Then I started reloading strait wall pistol cases & using a seperate crimping die. Now I use 4 stations.
Do I need the "other" stations like powder check? I don't know I've always been fairly meticulous so I've never felt the need for a gadget to replace attention to detail.
Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”