In my just started home game we are playing in 1920s prohibition Chicago. During City Creation we had an interesting discussion about Wizards and technology in that time period. What we decided was that Wizards could and would definitely still hex technology, but it wouldn't be nearly as bad as a Wizard in a modern microelectronics dominated world. We also discussed why pre-WWII tech seems to be more durable to magic and hexing, the reason we came up with was the shift in human belief in science as opposed to magic that got hammered home by the atomic bomb.
So for our 1920s game we've decided that since that major shift in magic vs technology hasn't happened yet, the hexing will only come up when it would make an interesting compel or is an active hexing attempt. Which given the rules is pretty much how it should be anyway, but the lack of computers, cell phones, and other high tech electronics everywhere means that it probably won't be as easy to compel at almost any time.