Originally posted by Jonathan Mac Size, weight, price.
There aren't many, but they're very important.
I've recently considered selling all my gear to raise money to buy into a FF mirrorless system but there just isn't one that I like.
Maybe my post and comparison link were missed. Link to comparison -->
here.
The Z5/Z6/Z7 are same size as a K-3 III and 20% lighter than the Pentax. But come with a Full Frame sensor.
I think the argument that full frame is bigger and heavier is not as convincing when we include mirrorless systems in the comparison. The weight from the mirrorbox and OVF are removed, which seems to free up some size and weight.
The Z5 is just under 1k USD right now. Used copies of course under that. Used Z6 go for just over 1K USD right now (but factor in the price of an XQD card).
It becomes more a personal choice on which system one values the most for whatever they want to do with it. An argument I care not to have -- thus I am just pointing out objective qualities for comparison (size, weight, price).