Yep can't disagree on one level BUT:Mart wrote: ↑Mon Aug 08, 2022 2:39 pm I quite like the idea of replacing dozens of switches, their cost, the cost of fitting them, and wiring them up, with a single screen. It fits the mantra of the best part is no part.
Our Hyundai IONIQ lights up like a Xmas tree at night, must be about 50 little blue LED lights to show where all the switches are. That's a lot of parts, cost and effort ..... and failure points.
If that one "control centre screen" fails then a massive part of the "control" of the vehicle is gone and is massively expensive to replace. If a single switch fails, a) it only stops the single item it controls working and b) if you are desperate then it is "just a switch" so in the vast majority of cases a "field repair" is possible, it may look a mess but any one with a smidge of electrical knowledge could bodge something to work. With the large display/touchscreen you pretty much have to have the exact item - there are no common interfaces/pinouts despite what the datasheets may say - so finding a compatible replacement a few years down the line will be less than straight forward. As for saving wiring, that was one excuse given for introducing CAN bus into cars, Well having worked on lots of cars over the years I can safely say that the amount of wiring in a modern car beggars belief compared with cars from not that many years back and every little "module" has its own control PCB "coded" to the main ECU (computer) making repair by anyone other than a main Stealer tricky. Ever tried getting a "spare key" for a BMW 1 series (2012 on) or a Suzuki Alto or even a "humble" 20 year old Mazda MX5?? cost £££££ and a trip to the main dealer - despite what all the ads from auto locksmiths - no one can do those cars, I know I have tried, and a knock off box of tricks from eBay or Alibaba won't either, despite the claims.
Also WHY does the IONIQ need all those switches? If there were less things to control, there would be fewer switches and you would know their positions and could find them by feel thus no illumination required - less features, less wiring, less cost, less to go wrong.
Everyone seems to get blinded by the "tech gadgets" foisted on us by the salesmen. The KISS (Keep It Simple Stupid!)principle seems to have been long forgotten when it comes to design of just about anything these days - along with making things repairable.
No apologies for the rant, but as the planet hurtles towards a man made implosion people need to wake up to the senseless consumerism and commercial promotion of "essential must have" over engineered, bloated products - and the motor vehicle is one of the worst offenders, closely followed by internet enabled toasters and fridges.