This Quora Answer: https://www.quora.com/Can-I-mix-microdata-and-JSON-LD/answer/Aaron-Bradley
The above answer from 2015 mentions there being a potential problem when marking up the same entity with JSON+LD and Microdata.
I am making a site that is hopefully SEO good for both Google and other search engines. Will I face a problem, in 2018, if I use both JSON+LD and Microdata to markup the exact same information on a page?
I understand that JSON+LD is the most recent recommended structured data to be used by Google. However, according to the official "do not"'s or "Make sure"'s, we are try to make sure that the structured data actually indicates something that is visible on the page. Also, I have read somewhere that JSON+LD is mainly for the knowledge graph -though that might be an outdated fact.
I would think that using both JSON+LD and Microdata for the exact same information would be a way to show that the structured data is marking up something "visible"/seen and what not as well as just make sure Google processes everything even if they do not act upon it in the way I may want, or at least right away. I.e, knowledge panels or other features.
Does it matter in 2018 if I use both JSON+LD and Microdata for the same information on a page? Or do I need to use one or the other for the same information just to be safe because Google has not revealed anything?
My website is largely static with the possibility of me implementing a blog with something like wordpress or django in the future as a separate part of my domain..