What? If that's true, they've gone completely insane. I know non 16:9 panels have been making a resurgence but most panels will be portrait for a while.
Besides, windows has had the best vertical taskbar implementation from all DEs since 95.
It seems to be true. It's mentioned in the article and one of the things Insiders with hardware that supports 11 are currently complaining about. The new taskbar can't be moved to any other position than the bottom for the first time since Windows 95. As a right side taskbar user since before even the age of 16:9 panels but who especially appreciates vertical taskbars in the age of 21:9+ ultrawides, everything about this loss of such an old feature boggles my mind (and makes me angry).
Besides, windows has had the best vertical taskbar implementation from all DEs since 95.