mmm id rather trust my boost control on two very simple air injectors controlled by one computer than having a totally seperate from ECU computer (ie boost controller) controlling the boost through a single valve.

At least with air injectors youve got two of them (redundancy) and if the ecu goes tits up then the engine dies totally. Plus Id imagine if youve got a good ecu you could set up a LOS for when it detects a boost anomoly and keep things safe that way.

Where as with a boost controller if it goes tits up the engine pretty much carrys on as normal til it says byebye.