The RAM is the HBM kind that won't fit in your motherboard at home. The GPUs tend not to have video outputs, require power supplies around a kilowatt, and powered external cooling. The whole lot of going to landfill when the bubble bursts.
The storage is reusable, I think. You might get a deal on SSDs and hard disks.
I had Kodi installed for a few weeks as my television media front-end, but it has:
It may well have a huge amount of functionality, but configuring and using it is the exact opposite of slick. Have uninstalled in favour of KDE with VLC installed, and manipulated via the KDE Connect mobile app, which is somehow a much better big-screen experience.