The Altar 1 from Electronic Materials Office was one of the keyboards I was looking forward to the most, mainly because I think it looks spectacular. But looks aren't everything, and the Altar 1 suffers from some "new product" issues.
Sunset Switches: https://lowprokb.ca/products/sunset-tactile-choc-switches
Monokei Systems: https://monokei.co/systems
Work Louder Nomad[e]: https://worklouder.cc/nomad-e/
Work Louder Creator Board: https://worklouder.cc/shop/creator-board/
KBDFans Solar 1: https://kbdfans.com/products/kbdfans-solar-keyboard-kit