Most of the trains were electric, including the freight trains.
https://www.youtube.com/watch?v=7-wyR316550
(The navy blue trains with yellow 'noses' are high-speed commuter trains, the dark blue, gold and white ones are the high-speed trains to France, the plain white ones are normal-speed commuter trains to London.)
I think the continuously welded rails are the biggest improvement, as they remove most of the "clackety-clack". Instead you get the "hiss", but that's only noticeable from really close.
Of course, everybody has different priorities and getting a huge noise source in your backyard after you decide to call a piece of land your home would be frustrating.
[0]: https://en.wikipedia.org/wiki/Atat%C3%BCrk_Airport - used to be a very busy airport.
Living close to a small, poorly-connected airport would be far less convenient than living further away from a major airport.
In fact when you live close to an airport you stop caring, perhaps not unlike smoke alarm chirps but without danger to your life.