And how exactly do we know that? Are there published tech and cost specs that show this to be true? I would love to know this cost of manufacturing of a mirror box vs the cost of an EVF.
Anyways the comment I replied to alluded to the skilled labor of installation, not manufacturing, because canon doesn’t manufacture EVFs.
In the end it doesn’t matter though, DSLRs from canon are extinct, and we are fully engulfed in the mirrorless canon world now.
Anything digital is cheaper to manufacture than the same thing built mechanically. A car dashboard used to have a dozen switches and knobs. Now, maybe 2. Plastic slabs are how we do things now primarily because it's cheaper. Even things that seem mechanical, like gas and brake pedals and even steering wheels are just joysticks now.
Even the focus ring on a lot of RF lenses just send electronic pulses to a processor that controls a motor which actually moves the lens elements. (Focus by wire.) Since that processor already exists for AF, it's cheaper to do manual focusing with the motor than it is to put precision machining behind the focus ring.
I did not know that Canon doesn't make its own EVFs. If that's true, I'll double down on my prediction that we'll be seeing super-cheap mirrorless cameras in the future. If EVFs become a commodity, some company will buy up clearance stock of last year's technology and put out a $400 mirrorless box, probably with an electronic-only shutter.

Explain 


