I use virtual desktops to separate apps when developing (1 for terminal, 2 for the app, 3 for docs, 4 for the IDE, 5 for additional tools). I switch between them every few seconds sometimes, so the exact numbering is important.
With KDE activities, it's nice to be able to have two fully separate projects (different customers or contexts) open at the same time, while keeping their respective virtual desktop arrangements.
I use virtual desktops to separate apps when developing (1 for terminal, 2 for the app, 3 for docs, 4 for the IDE, 5 for additional tools). I switch between them every few seconds sometimes, so the exact numbering is important.
With KDE activities, it's nice to be able to have two fully separate projects (different customers or contexts) open at the same time, while keeping their respective virtual desktop arrangements.