I understand that the stock Turris Shield software is “simplified” with respect to the MOX or Omnia products.
As CZ.NIC is an upstream contributor:
and vastly benefits from a plethora of upstream projects like OpenWRT, etc, I would expect CZ.NIC to support the open source community in its upstreaming efforts.
So the questions is not about the preloaded Turris Shield software, but if I can use a generic ARM64 Linux distro using the MOX U-Boot & kernel dts (→ dtb) files.
I acknowledge “using Turris OS is the only way Turris products are meant to be used, and I will get no support if I install a generic Linux”, but hey, by telling the untold truth you’d get my money (and love from the open source community that your product is built upon).