My limited understanding is certain GL devices rely on a proprietary SDK that’s not F/OSS to fully support GL’s advertised features/specs.
If you’re worried about longevity (as I always am!), go for the Flint v1 (GL-AX1800) or Slate AX (GL-ATX1800); @solidus1983 already has some exciting builds for ‘pure’ OpenWrt Linux available if that’s more your speed/GL ceases support in the future.