If this were remade today in the same way without any car chases, noisy explosions, big stunts, bloody firefights, ton of foul language, lots of CGI, hot female eye candies, it would immediately flop at the box office and be shunned by film critics.
That's indicative of how brain dead most of today's movie audience are: they don't appreciate smart cerebral films and they want everything on the screen explained to them.
Plus no actor alive today can play the role of Harry Palmer as well as Caine did.
