I still see a good amount of clear text web traffic when I do packet captures in airports and the like.
Usually image or media files, but the odd time I see some badly conceived automatic update process pulling an exe or msi over plaintext HTTP.
Of all the places I'd avoid packet sniffing, that's high on the list.
In the real world is it embarrassing to have Emacs installed? Or KDE? Or even Tux Racer ? Probably not. But all things being equal we'd rather the program just kept this to itself right?
Not to mention the additional possibility of exploiting apt itself vs. having to exploit the TLS stack (which goes trough a lot more scrutiny).