MacDrawPro vs Illustrator

Hello everyone. Graphic design is a miniscule part of my job, and I've
been using MacDrawPro (original program still on floppies) at work for
years now, from an LCIII in '93 up through several Macs. It has served my
needs well, mostly for floor layouts, diagrams, etc. (For example, most
recently, submitting a detailed layout for a computer/multimedia lab.)

I've been handed down two copies of Illustrator, vrns 6 & 8. Is it time
to get current and switch? How is the learning curve? We are a PC-based
org, but next to my Dull Plentium Oxyplux my current Mac is a Lombard/400.

Any advice on the pros a/o cons of switching would be appreciated.

Thanks,
MK