Does anyone use $\subset$ for proper subset anymore?

Question

I belong the the group of people who still write (not necessarily proper) subset as $\subseteq$ to avoid any confusion with proper subset, which I notate $\subsetneq$; I usually do not use $\subset$ at all. But now that I think about it, I have not seen anyone use $\subset$ for proper subset in any post-1960s textbooks. Is it still used for that at all, or can that use of the $\subset$ symbol be considered archaic?