I can't speak to the technical merits of the machine, but I think IBM did a great job with the industrial design. It looks like some kind of alternate history where super-integrated vacuum tubes won the day.
Surprisingly, modern-era IBM supercomputers and mainframes are some of the "sexiest" machines out there in terms of industrial design. Apparently they put a lot of effort into that
I was surprised to learn that 99% of the shiny parts in the photo belongs to the dilution refrigerator (https://en.wikipedia.org/wiki/Dilution_refrigerator) needed to get the machine down close to absolute zero. The actual computer is a tiny chip at the bottom of the apparatus!
https://cdn.wccftech.com/wp-content/uploads/2018/06/Summit_O...
https://images.idgesg.net/images/article/2017/07/ibm_z_4-100...