Its boring but its better looking then a lot of the tasteless TG everywhere and unicorn vomit "gamer" cases that make up majority of whats out there. And the airflow at least looks decent on this with proper (functional) ventilation.Uck.....1990 called and wants its computer case back.
Big OEMs have been using proprietary stuff since forever because ATX no longer works. Not that the OEMs are doing brilliant things on their own but at least this one looks like everything is accessible, the cooling and airflow looks decent (idk why they are using a fan that powerful though), and heatsinks with actual surface area on the VRM (who would thought it possible!?!?). I like what they are doing with that GPU support too and putting a fan right in front of the card looks nice.This is nothing new. They have been using proprietary parts since their inception, such as power supplies, motherboards, front panel connections, etc.
My first experience was trying to upgrade the motherboard within a Dell case back in the Pentium II days, where the front panel connector was not standard.
Second time was needing to upgrade my power supply from 200w to 400w due to a new graphics card in a Pentium 4 machine. Luckily, PC Power & Cooling had specific power supplies for Dell. After that, I decided to build my own PCs.
I'd say its pretty well though out and designed, you can't blame Dell or anyone else for making something propriety when there is no good standard for them to follow.