Granted, the director could have included audio of the screeching brakes of the train to signify the train was trying to stop. However, I think they wanted the focus and scene kept solely on Jasper and his deadly mistake. Kinda like emphasizing totally how isolated he was in that lifechanging moment. Exorcizing the train altogether, including the sound of the engineer braking, from that particular scene was intentional I think for that reason.
Everything else I will defer to anyone's interpretation. It is an old discussion point concerning how much imagination should a viewer suspend in order to enjoy fictional details more. For me, I can "accept" some scientist inventing a super-duper antenna that can beam a signal at a specific computer, cell phone, etc. Or construct electronic diagrams someone 70 years younger can decipher and construct equipment mechanisms from currently available materials.
It is a voluntary choice of acceptance in order to be entertained. Personally, I do not think any of it is possible--just like I do not think Star Trek or Star Wars stuff is possible. There are things I do not accept--like someone else seeing the damage done to New York City in
The Avengers along side the damage inflicted upon Metropolis in
Man of Steel and saying there was
more devastation shown in NYC
. A simple scene by scene visual comparison between the movies destroys that contention but that example can be debated with tangibles. The stuff happening in
The Peripheral is almost completely intangible in nature, plus not even thrown into the audience's face like typical Star Trek technical jardon often is presented.
I can take what the show wants the audience to accept for entertainment without much questioning. At the same time, I can see why it will get criticized for what it is based on too. Just not enough for me to think about geeking out. And everyone knows how I typically geek out about stuff.