I’m on Cubase 10, not 10.5, so I don’t know if there is anything newer. I made the switch from 8 to 10, and it took me a bit to get used to the way the windows work. But then I watched an intro tutorial video, and I started to see what they did and how it could be used. I think it was “Born to Produce” on YouTube. The basic window now has subsections that you can show or not show - left side being the inspector, top section being the track window, bottom section being the mixer (or it could be an editor - there are tabs), and the right side being a media panel. So for people who are making music from samples or virtual instruments, you can drag samples into the track window and automatically make a track. I think that’s the whole idea.
But meanwhile, my old templates still work fine – for orchestral recordings, for example, I have a screen where there are separate windows for the tracks, mixer, and edit window arranged to fit so all are visible, and I also use the inspector, but I don’t use the media panel. So when I’m working in this mode, I feel pretty much like I’m in 8. I import audio files from my digital recorders into tracks, and go from there. But when I’m doing some original stuff, including my own guitar and some virtual instruments, I’m using the new single window, and I’m getting quite used to it.