Regarding specifically: 

The second thing that falls on my mind is making directories named by dates. For example: 04-12-2018, 05-12-2018 etc. Or maybe even "/home/$USER/selected_directory/$YEAR/$MONTH/$DATE/filename*.svg". At times I did crave for being able to go back in time with finding some WIP versions of a file...

This sounds like the perfect reason to use a versioning tool like git. Perhaps a future project is integrating git revisioning with inkscape?