Hello, ox-hugo author here. Hugo has the best support of Org Mode as a markup. But Org mode is more than a markup. I ended up facing some limitations with the original Org mode parser used by Hugo and so I developed this exporter. Since then the Org parser used by Hugo got replaced by an even better exporter, but still the points mentioned here apply: https://ox-hugo.scripter.co/doc/why-ox-hugo/

The biggest ones are being able to organize all my posts as subtrees in a single Org file and leverage the Org mode's inbuilt"meta data" inheritance.