I still use one sometimes, or as been said a damp scrim and a drier one.
The fact is that many top openers are quicker done this way than with a sqeegie.
You nearly always have to detail these small windows.
If you have a conservatory with small windows on the top, it is quicker done this way than even WFP. Leather or wet scrim in one hand, a slightly damp, clean scrim in the other. You can leather at the same time as polish.