I wonder about the software though.

  - What kind of BIOS does it have?
  - Does it support coreboot? 
  - Can Intel Management Engine be disabled?

I was looking for something similar recently and have found StarBook MK V - https://starlabs.systems/pages/starbook.

It supports coreboot and has most of Intel Management Engine voided.

It's repairability looks good too:

  > Open warranty. Laptops designed for open-source software need open warranties. Our 1-year limited warranty allows you to take your laptop apart, replace parts, install an upgrade, use any operating system and even your own firmware, all without voiding the warranty.