Fantastic Beasts/Harry Potter watch order?

When all the FB movies are complete and released will there ever be a discussion about watch order, similar to Star Wars… Like should a new viewer start with FB and then HP in timeline order or should they watch HP first in chronological release order?

the first 2 HP movies are clearly aimed at younger kids and get gradually darker, FB just starts super dark and (so far at least) stays there!

 

My partner is a huge HP fan, I just asked her, she says ideally you should have read the HP books before watching FB but watching the HP films first is essential, otherwise the FB films don’t make sense.