I’ve always driven hatchbacks or estate but looked at a couple of saloons before buying my current car.
The volume of the boot was usually reasonable, the big issue for me was that the boot opening was generally too small to be practical for transporting things that aren’t packed into suitcases or bags.
Also, I found that it was often difficult to react to the front of the boot area, the bit directly behind the rear seats, without actually climbing into the boot (I’m 6’2″ so would think that shorter folks would have even more difficulty with this).
Some of them didn’t have folding rear seats so shifting long or bulky items would be an issue.
IMO they’re fine if you don’t need to transport very much or if you have access to a more practical vehicle for shifting awkward items (like bikes or garden waste).
I’m sticking with hatch/estate cars.