It would be extremely useful to have a date filter that had a dynamic interval that only selected records older than a certain period (e.g. "More than 90 days ago"). Currently, you have to hard-code in a specific date and manually update it to achieve the same query.
Hi @WhiteRabbit
There's an issue for that:
https://github.com/metabase/metabase/issues/4083 - upvote by clicking 
on the first post
Wow, 5 years old. I won't hold my breath. 