Thanks for merging the posts! The subject is indeed a very interesting one for me, since I am an UI/UX Designer.
I briefly used Figma for two months in another company, but I am mostly familiarized with Adobe XD and use it a lot nowadays.
About Zoom, I don't even use it for work (I prefer to avoid it, due to privacy concerns) and unfortunately I have to use Google Meet for my team daily reviews.
I think I have briefly used CUSeeMe before I moved to MSN on Windows, but I can't remember well. Anyway, the iSight camera design is an iconic one and still ahead of its time.
Now in 2022, the most similar theme to OS 9 platinum is a version of it for XFCE4 on Linux available on github. I used it for my Raspberry Pi 3B and Raspbian. Can't deny that it is a very simple, well designed, effective design for low energy systems. I wish Linux distros followed that route instead of Adwaita and "wannabe macOS X" themes for GNOME and KDE.
Not that I am not a fan of current modern Monterey theme, I like it too, simplicity is key for me, but nothing beats OS 9 Platinum or classic Windows 9x themes. I was never a fan of OS X brushed metal themes (I prefer the pinstripe version) and Windows Aero/transparent theme.
EDIT: I tried to edit my 1st post here to comply with the forum rules for image size (height=300), but I don't have an edit button for that post. Probably lost it when it was merged. Can a mod fix it for me? Thanks