Every time I see an Inkscape update I skim it for "massive performance upgrades" and am invariably disappointed. Inkscape doesn't need features, it needs to not lag for 5 seconds when I open a menu, it needs to run at 100+fps when I'm editing paths.
EDIT: I installed the latest version (under W10) and while it doesn't degrade to bounding boxes it's still like 10fps and it leaves trailing copies of the item being dragged around the canvas while I'm dragging. Really disappointing.
cd <Inkscape directory>
set GDK_SCALE=2
start inkscape.exe
And within Inkscape using the Minwaita-Inkscape theme and 80% font scaling to scale back the otherwise-now-too-big UI.
On both my Mac and PC, the main frustration once the UI is scaled correctly is that often closing pop-up windows (i.e. Document Properties) simply doesn't work. Sometimes using Inkscape's tab close button rather than the MacOS/Windows close window button works, but other times the whole app will freeze up and crash when attempting to close these pop-up windows. Have had this issue for multiple Inkscape versions now, hoping the devs find a way to fix it.