There sure are less of them sadly. Here in Montreal we have had 747s over the years scheduled into Dorval or Mirabel by Air Canada, Royal Air Maroc, Air France, KLM, British Airways, Swissair, Iberia, Air India, CP
Air, Sabena, Alitalia, TAP Air Portugal, Olympic, El Al, Wardair, Nationair, Corsair, Aerolineas Argentinas, UPS, Cargolux, Air France Cargo and if I recall Lufthansa.. probably some more but I can't think of any others at this moment.
Today we are left with one daily Air Canada 744 to Frankfurt and an Air France 744 to Paris but along with A340s for the other two Paris flights. Royal Air Maroc now sends 763s. KLM sometimes sends 743s but this year has gone down back to MD
-11s. British Airways sticks to 777s except during Grand Prix weekend when they send in their 744s for a few days. Many others have switched to A330s and A340s (Swiss, Corsair & Olympic). The rest have either left this city, been bought up and merged or have gone bankrupt... I see less at Toronto as well. Frequency seems to be winning out over volume flying.