Some people here don't mind to pay for a download, please think to add that option also! A storage for big data being available to download, even TB, is more cheaper than DVDs+Handling+Shipping, not to mention the risk of post service stolen, vat (here is 23% without minimum limit), custom fees, etc
Exist multiple large storage solutions: google cloud, amazon s3, microsoft azure, dropbox, ....... only to mention a few
My internet speed that is very common here is +120Mb/s, from my ISP, the newer solutions are around 200Mb/s, so big downloads its not a big deal. If people have internet issues they have the DVD solution, but for others that have very good internet, paying more to vat, taxes, etc and with multiple risks associated is a bit frustrating.
Some time ago I got a peninsula Iberia scenery for xplane flight sim, it was +300GB, in modern times no one will send it on DVDs, if you use the dual layer DVD 8.5GB it will be 35 DVD that's completely non sense to send them.
Today if the size is small is almost cheap or even cheap to send it through internet, if the size is huge, is more cheaper through internet than a tradicional DVD, not to mention that many times is impractical like the example above for very large amount of data.
If the total maps are huge, I'm fully open to spend a small fee to help pay the cost of an online storage to have that data available through a download ;P
Thank You!!!