In many cases, you'll end up making something that works using simple relays way more complex, so you'll still need some kind of technician to troubleshoot the

In many cases, you'll end up making something that works using simple relays way more complex, so you'll still need some kind of technician to troubleshoot the equipment when it fails. The "advances" in equipment technology is mostly for sales brochures but in many cases the increased complexity creates more failure points and simply requires a different type of technician to troubleshoot.