To be very honest I'm surprised there are some people who see this as a good thing - losing licenses with the upgrade. Sure you can only upgrade 1 license but then remember that VEPro 6 and 7 won't communicate with each other. And we have no sure knowledge one way or the other whether VEPRo 6 and 7 can even exist on the same system. That's what's wrong.
Very simple, isn't it?
Well, sorry to insist, but nothing is wrong in my very humble and very personal opinion:
what you can say is that it's too expensive, then you don't buy it and full stop.
You may also say that you don't know enough, then you just wait to know more and/or try, then you buy later or never.
It's totally simple my friend: It's your choice.