I know that is a bit of a draft question, but I am looking for an established manufacturer who build boxes with good decent open hardware(or support Open Source Software).

I initially found this forum via YouTube reviews of the Mutant HD51, which looks absolutely fantastic and would cater for my needs. However, WOS seem to have sold out of these boxes,so I went over to mutant-digital.net and noticed there has been no news for well over a year. Are they still in business?

The WOS store seems to recommend the Zgemma H7S as a replacement for the Mutant HD51, so I was looking at this brand which seems to be made by a Chinese company called SHENZHEN AIR DIGITAL TECHNOLOGY CO.,LTD. So I was wondering are they a reliable company who support their products, or just another Chinese popup flogging cheap boxes with little or no support going forward?