Really liking groupy, for a long time I've though (file) explorer especially not having tabs is just silly, having 10+ individual windows open is just a pain to manage vs 10 tabs on one window, bought it and happy so far, though I have some suggestions for improvements like the ability to color combined tabs (not placed above) I'm running a custom windows theme that sadly kinda clash with groupy:

The leftmost tab having no background causes a problem with the theme's menu button thing (meant to use some other software I'm not using to open a menu by clicking there) and the theme's inbuilt split between the left area of locations and the right contents looks weird with the tabs running across with no background.

If I could put a colored background for the tabs it would look a lot nicer, I don't see a good reason really why the custom colors are only accessible to the placed above mode.