Some of us use or used the fancy software in our day jobs so its VERY easy for us to do it. I use Autocad. The same software I used to design the Audio/Video/Fire systems for the Hawaii Convention Center some years ago. It's second nature once you have the skill set. For me it's faster than paper and pencil. Everyone uses what works for them. Since I have access to a plotter I can "print" patterns with a maximum size of 48 inches wide and 30 feet in length. Now all I need is an Elephant that wants a skinny belt.
There is something about designing and printing a pattern for a $100 holster on a system with $10,000.00 of hardware and $8,000.00 of software. I love overkill.
If I did not have the knowledge and access to this system I would be using paper and pencil too.
Michael