I made the tool public - GitHub - ashishb/wp2hugo: The best WordPress to Hugo migrator (written in Go)
I primarily used my website (https://ashishb.net) as a test bed (https://v2.ashishb.net)
The tool handles quite a few quirky things right like maintaining RSS GUID, embedded media, post URLs, WordPress Captions, YouTube embeds, draft dates etc.
I am confident that this is one of the best tools right now to migrate WordPress to Hugo