About 20 years ago, I had an Campagnolo ergobrain with Polar s710, which gave me loads of info (speed, distance, altitude, power, HR, temperature, calories, etc). Then some other road rider passed by me and I noticed they didn't even have even the most basic cycle computer! Eventually, after about 5 years, I got sick of all the wires and sold everything, rode without anything (because it's lighter and I hate replacing batteries). I stayed that way for about 15 years.
Fast forward to 2020. I had a bit of a fear of traffic after 2 car accidents in Australia. So I decided to get (or try) a garmin varia radar (based on word of mouth on cycling forums). To get this working, you either need a smartphone (my old one with Android 4.2 didn't cut it) or else buy some kind of head unit. I settled for a wahoo elemnt bolt. I like it because it's wireless.
I didn't get it for the GPS function. Because I mainly know where I'm going. But I'm about to go on a "gravel" route that I 'programmed' into the device (using both komoot & ridewithgps)... offroad trails aren't shown on the default maps on the bolt... There was a bit of a learning curve, but it worked. Hopefully I'll be able to test it out some time next week!
I'm one of those people who not lag behind new technology a fair bit (now that I'm older, when I was young I embraced it all).
After reading the book "future shock", I find it all very stressful (the decisions and button presses).
The last bike I bought was in 2007. I don't really use my smartphone much and not addicted to strava/zwift (don't have either).
I do like riding with the varia (at least on quiet roads, on busy roads it's of little use).
But I'm not really into all the modern electronic technology on the bikes themselves, such as electronic shifting.
Maybe if I tried it I'd like it, but I get sick of plugging in devices to charge, so I'm trying to keep them all to a minimum.