This may betray a misunderstanding of how things work on a core level, so bear with me.
I noticed that when we create templates, in the "headers" - the section contained within two blocks of 3 dashes - there's a default entry to add {{ time }} as a "date:" field. I think date fields are pretty cool and as I use this application more and more over time I realise that being able to filter files based on date would be very handy. As mentioned in other comments, I use Deepdwn heavily for work and the number of files will only increase.
For my use case, the ability to not only filter by date, but have a default filter I can set that persists when re-opening Deepdwn would be amazing. e.g. "Only show files with a date of the last week". Obviously that would be a problem for files that didn't have the field set!
The alternative is to ignore that field entirely and go off actual file modification date in the OS, but users would have little control over that.
This is not the most well formed request you'll get but hopefully this will inspire something clever with dates...! :)