> At least 4 5.25" bays for optical and floppy drives.
  > At least two 3.5" bays for floppy and zip

I mean sure, everyone has different requirements, buy it seems you are not looking for a PC case that counts good today. You are looking for one that counted good in early 2000s. Zip drive has been dead for good part of the past 2 decades, and finding a _modern_ mainboard with ide connection for the Floppy would be quite a challenge (I won't even mention finding a new internal floppy drive...)

It seems you want something like a Fractal Design R5: https://www.fractal-design.com/products/cases/define/define-...

(or a larger alt like this one: https://www.fractal-design.com/products/cases/define/define-... )

That said, be aware that these things are heavy and bulky, as other commenters posted. I used to have one but replaced it with a SFFPC and have been quite happy with the change.

Sounds like you're looking for full-tower PC cases. They're massive and seem thoroughly unnecessary to me in this modern age but everyone's requirements are different.

Even the giant ones I find seem to have no drive bays, either just filled with fans, or some glass plates with LEDs.

Given that there are adapters for 2.5" and 3.5" drives in 5.25" bays, maybe you want an all 5.25" external bays one?

like:

https://diymediahome.org/the-search-for-a-12-bay-5-25-full-t...

Does this match your color preference? https://www.alternate.de/be-quiet/PURE-BASE-500-Tower-Geh%C3...

This seems too shallow to allow any drives at all ?

>* At least two 3.5" bays for floppy and zip

Floppy and zip drives?

>* At least 4 5.25" bays for optical and floppy drives.

a 5.25" floppy drive?

Are there even any motherboards that still support floppy drive cabling? Are their any BIOSes that support floppies any more?

They’re in 2001.