In fairness, you have not addressed the question which has been asked.
Why is there not an upgrade path from v4 to v5?
v5 currently doesn't include all of the functionality of v4.
For instance, it doesnt have the option to "power on" an unattended device.
The v5 Agent Console doesnt have a "refresh" button, so if a device changes state from offline to online (or vice versa), then the Console must be closed and restarted for it to see the change.
And then there are other minor items which are quiet annoying. Eg, the console will always revert back to sorting devices by "status", each time I log in. My preference is sorting by device name, so that i can find what I want reliably every time I use the console, instead of looking through a list of list of who's online or offline. Apparently your team doesnt like alphabetical ordering, like the rest of the world.
But atleast we have "labels" in V5. As if anyone gives a fck about labels.