You will quickly realise that this can become rather overwhelming if you will need to send out your CDs on a constant basis. Yes, some people are still shipping tracks rather than offering them online.
If you do this it may really slow down your entire work. Would you know how much it is to send a tape or CD to Poland? Would you be allowed to send your demos to China? And what about customs? All these things need to be considered and it can really be a pain in the ass especially if you have interested folks in many different countries.
For me, I found that export software can be a great help. The biggest benefit with expert software is that it helps with organising and always having the proper documents for customs. Now, it may be such a big deal when you send out CDs. But imagine a small business that sells electronics, perfumes, foods or similar items. I can tell you from my experience that you will definitely need some sort of software to help you there otherwise you will quickly be lost.
And for larger companies, export software can actually help them tremendously saving costs where they would otherwise probably need to hire extra people just for those types of things related to shipping.