I personally strongly prefer the current native look (I use all defaults except I chose the tabbed interface) and would absolutely hate a redesigned bloated, slow, resource-intensive, “modern” look.
There are multiple posts online of people wanting to improve the look of LibreOffice getting tons of views or likes but it doesn’t look good or easy to use (tiny inconsistencies, lots of empty white space, and looks like something that would be dependent on Chromium). Software isn’t even supposed to look good, it should just do the job well without wasting unnecessary resources.
Any redesign considerations should be strictly based on the current users legitimate interests (not users that just want to redesign things) and if same or better performance and usability is actually feasible with the current development team. If it’s not broke, don’t fix it. Otherwise, people will leave.