LOL I just got done watching @wendell 's video… Thats my motherboard 
Also, I’ve seen above my case the Fractal Node 804. Obligatory Pics here:
Also, if you look at the pictures you notice the CPU cooler… Wait how is it mounted that way??? If you look at Post 12 from the same blog I did you can see the water-cooled solution I tried…lol It worked just fine, I just decided I didn’t want the risk of it frying and spraying coolant all over my hardware. I used all my hardware I had squirreled away to mount that monstruous 120mm MSI cooler “the right” way in the case using a Noctua mounting kit, and merging it with the MSI hardware :). The cooler worked because it was “offset” over the center of the CPU socket to miss the RAM because I ended up upgrading to 64GB using all the DIMMs.
@wendell I’m excited to see where you go with the case choice. I had been eyeing hardware (because I had nothing to do over pandemic and till now…well and forever now that I’m retired…lol) for a long time… Prices for cases, especially with hotswap capability were high before, but no where near as bad as they got. They have settled some, but seems they were in high demand for a while (everyone building PC’s or NAS’s with free time? lol JK I know better). I went the Fractal node 804 route sacrificing the hot swap due to price.
I did however see an interesting case I’m not sure I’ve seen you mention that I have been eyeing… It wouldn’t fit your need for the X470D4U M-ATX, but its a ITX case with 6 hotswap bays and takes a FLEX ATX psu and dual rear 120mm fans with room for a single pcie expansion card.
Found it here if your interested… It keeps selling out and pushing back delivery dates. Sure its a cheap Asia no name special.
There had been some changes to mine. I went for a RAIDZ5 with the five 6TB Ironwolfs instead of mirrored pairs with a hot spare, Up to 64GB ECC ram from 32, I added a Mellanox 10G Nic, and swapped a few different drives around. I have the Ryzen 2700 in it now, but a 3700x or the 3900XT I may put in. Depends on my next gaming build. Of which I have a plethora of cases to explore… Like on my post HAA (Hardware Addicts Anonymous).