when you say "modern" do you mean all 2D FLATTY with a ribbon and hamburger icon button rather than a traditional menu? "showing its age", yeah, right. I have a zillion pejoratives that are in my head at the moment, and none of them should be uttered.
"Modern" as defined by Win-10-nic is *HIGHLY* overSTATED. It's not "modern" at all. It's MORE like Windows 1.0 !!! [would paste obligatory screenshot archive link, but I'm lazy today]
ribbon, hamburger, fat-finger-friendly icon spacing, 2D FLAT appearance - not "modern" at all.