When we were building our JaxonCraft, Robert explained the difference to my wife,
Serious Fishermen tend to want the open back,. gear access and faster access to the rods is a top priority
Folks who will used their boats year round, tend to want heat, moor at a Marina and want to lock up their electronics and "stuff" often decide to go for a solid back wall for security first and then comfort.
The Chinese diesel heater warms up the cabin of our boat quite quickly.
One thing I noticed is that on long runs how much quieter the boat is with the cabin door shut at any speed in any weather .
It is nice when tied up at public marinas or tied up at places like Granville Island to be able to lock up the boat securely.
If we fished more, trailered our boat, and put it away for the colder months, or lived in a warmer climate
I could see the advantages of an open back. To each their own.