"Supports UEFI Boot" ← This sounds good already for booting generic Linux distributions, now the question is how well the mainline kernel supports this board. Having to use a special-patched kernel is a no-go if you care about using this board after a few years when it becomes niche. The Libre Computer boards are a good example in this regard (https://libre.computer/products/) they are very niche but since the mainline kernel supports them and they use UEFI by default, you can use most generic Linux distros without a problem.
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"Supports UEFI Boot" ← This sounds good already for booting generic Linux distributions, now the question is how well the mainline kernel supports this board. Having to use a special-patched kernel is a no-go if you care about using this board after a few years when it becomes niche. The Libre Computer boards are a good example in this regard (https://libre.computer/products/) they are very niche but since the mainline kernel supports them and they use UEFI by default, you can use most generic Linux distros without a problem.