Talking this out loud so bear with me… this also is because I more often than not use blank pages rather than the direct collection view page that’s pre-made when I add a collection. Because I almost always need data from multiple collections on the same page rather than individual pages for individual collections. The data just rarely works out that way for my clients that everything is on it’s own table/collection and can just stay in it’s own lane without the need for pulling multiple collections together robustly.
Shifting data/visualizations across separate blank pages or separate base record pages from the same collection
One feature I love about another platform 
is the ability to copy something from one page and move it to another. We have that ability when we’re adding tabs on 1 individual page- to copy the section/item/(what do we call it?) and move it to a different tab on that same page. Being able to do that with separate pages (blank pages or base record pages is most often when I would use this) would be a major time saver.
Shifting Data Sources on a page that is already visually curated
This happens less often, but sometimes clients have interesting data sets and we have similar or identical data but it’s coming from two separate Airtable tables or bases. Might be nice to be able to shift the data, but that’s a low need/use case.