If anyone is still interested, it is still possible to redeem the discount, even though it says until March 20.
If there is, you’ll be on the upgrade path having spent a lot less than you would have without the special offer, so your savings will continue.
One of the great features of Wavelab pro is the ability to write DDP files. This gives you the capacity to do error free file uploads to CD replication services. There used to be software on the market (and maybe it still is, for all I know) whose ONLY function was to do this, and it cost at least 5 times what the full version of Wavelab costs.