OK I have some rants about cases now. My Corsair 300R has the 3.5" drive cage rotated 90 degrees and uses trays that can also handle 2.5" drives so it is far less awkward to install new a HDD/SSD. This should be a standard feature of cases, so why isn't it?
I suspect it is partly historical. Before larger case fans and tower coolers became common cases tended to be a little narrower, which meant mounting the drives sideways would've been problematic. It also means you need right-angle cables for data and power, which were less common back in the day. You get less airflow across the drives too, since the sides of the drive cage are perpendicular to the airflow. So it's not necessarily a win-win, though I agree it makes swapping drives easier.
Glass windows on cases, why would anyone want something that very easy to break on their hardware? It seems that way too many otherwise real nice cases have this "feature"
Aren't most of them actually plexiglass (so less breakable, but easier to scratch)? I'm not a fan either. It only makes sense if you want the innards of your PC to be visible, and I'm generally not neat enough with routing cables and tying everything off to want to look at the insides of the PC. I suppose it's useful from a standpoint of making it more obvious when it is time to vacuum the dust bunnies out.
I also wonder if systems built in many of these windowed cases would pass FCC EMI shielding tests?
IIRC WD actually had a windowed hard drive for a while, about a decade ago.
Water cooling. Not everyone is going to use water cooling to overclock if they even overclock at all. Why don't the manufacturers offer the same model without the vents on top of the case?
Locations for additional exhaust fans are potentially useful even if you don't watercool. Just don't set your drink up there where it can potentially get dumped into the vents. Perhaps they could provide some panels you can install if you don't intend to install top fans? This would potentially improve airflow a bit when there aren't fans there.