Yes, complexity is higher, but the complexity is at the chip level.
This stuff is getting cheap and it's down to the hobbist level now.
check out http://www.sparkfun.com

As an Aerospace engr I always marveled at the no cell phone use or
other banned electronic devices on aircraft. The amount of testing we
go through to cert a piece of avionics is mind boggling and quite $$$$.
Some of these levels (EMI) would fry you.