That's why I bought a Bequiet! Dark Base 900 (standard edtion...no window). Lots of room, very good fans, plenty of ventilation, and effective noise dampening.
I still own my old 3x Lian Li Full Towers & a Cube Case.
But they aren't "AirFlow Efficient".
They do come with plenty of 5¼" Drive Bays.
But I want a "New Design" that I have in my head that I want to get built and have the masses try it out.
One that is "AirFlow Efficient" & has plenty of DriveBay expansion for Storage BackPlanes that fit in the standard 3½" Drive Bays or 5¼" Drive Bays.
A "Full Tower" main volume designed with 2x 20 cm Intake Fans of > 25 mm thickness (Preferably 35 mm)
Special 16 cm Exhaust Fan situated right above the Rear IO Panel in a "Box Bay Fan Window" that accomadates a 5 cm thick 16cm Exhaust fan.
3x 8 cm fans that are 35 mm thick above the Rear Add-In Card slot area in their own "Box Bay Fan Window".
The Second Chamber with the Component Cages will be on the other side of the main MoBo area with 3x 90° Sideways (Vertical Standing) 3½" Drive Bays aligned side-by-side along with another row for at least 3x 5¼" Drive Bays in a Side-by-Side config.
Think Corsair Carbide Air 540, but with more Drive Bays on the side, sideways oriented and in "Full Tower Config".
Plenty of room to work on your components and to add LOTs of Storage BackPlanes of your choice.