Just curious - Why so many windows? Are you monitoring multiple systems?
Can't speak for your quoted but I can have fair bit of apps open.
Just came back from a Tokyo trip and lots of RAWs to work. Post processing app doing its thing last night.
Same trip I finally got my Ninja 2 external disk recorder/monitor for my dslr video new hobby. So cheesy few minute clips being uploaded and looked over in final cut pro. mainly testing the system's ability to gauge focus and exposure. Manual focus was my issue with dslr video...now I can improve on that from what I saw last night.
Parallels opened up. It hosts my Linux servers that were being updated last night.
Terminal app (iterm2 I like) used to ssh into the servers as CLI only servers and setup as headless since I prefer terminal over the parallels windows to access them.
Safari open surfing.
Several windows open to set up file transfers from MBP to my NAS. Enter cloud/management debate...for my predicted data needs it was more cost effective to buy a NAS with a fair amount of TB's than to pay say google drive for same level of service.
I tend to leave .txt notes in my folders. So BBEdit open to write said notes. Case of pics text file gives basic info like what was shot, and notes I'd like to look up not having to open up an application to read exif data and some data is not even in exif. Like if neutral densities (ND) filters used, these screw in, they don't talk to the camera as it were so not in exif data.
7 apps there. I will take away file transfer since not an iOS feature. leaves 6. Parallels...I live and die by so it stays. Learned early on in it its best to break stuff in virtual than in production. VM breaks you can delete it , restore a backup/snapshot and you are back up in minutes flat image size depending. break your production box...much much longer to be back up.
Nice t-bolt display with the option to drag smaller windows to the MBP display (I don't run clamshell) and I get a fair bit of screen real estate to work with.
I can abuse my MBP basically.
Again this my needs. Some people can work off the 1 or ever 2 screens IPP split screen can give them. Cool it works out for them like that and I am happy for them really. Not saying I am uber pro user and they are not. I actually envy a streamlined setup and wished I could have it at times. I just need to do lots of things at once at times. Others do as well.
Work what works best for you as in all things really.