Good content is good content regardless of the date

You may have video purists who want up to date video but if you have a pool of 100 people and 2 of the 100 request modern content only, this doesn't reflect on the entire pool.

Something I hear a lot of is people changing their format based on a rather small % of requests and retell the story with the wording "a lot of requests"

It's hard to juxtapose mainstream with adult but you will find many "classic" movies that continue to do well. And will as time goes on.