Would be interesting to have a vblog that explains/demonstrates what features high end design packages provides beyond the common eagle/kicad/diptrace.
Where does one start?
For example Altium Designer:
Extensive libraries of many 100,000 of parts listed by manufacturer.
Extensive cross probing back & forth between schematic & PCB.
Ability to set up extensive rules for placement of tracks, components, pads, polygon pours etc etc.
You can modify absolutely EVERYTHING on your PCB on EVERY layer.
Netlisting, Autoplacement & Autorouting will make you productive (once you're over the steep learning curve that is).
But (in my view);
It is not nearly as intuitive as Protel 2.8/3.0 or CircuitMaker 2000 Pro or Circad or Diptrace.
How do you make a decision on which software to use?
When the software you are using now does not do what you want it to do, or it is too slow at performing all the tasks you require because it requires so much input from you ................ then perhaps it is time to trade up to something more powerful.