If it ain't broken ...
> the suppliers of heavy equipment sell sealed-box products that are sold as just working.
And if only more IT kit was like that.
The most reliable kit in most datacentres is that insignificant little box in the corner that runs a dedicated application on top of NT, or Solaris 6. Nobody knows how it works, they just know that the supplier "deals with it" and won't allow anyone else to log in, upgrade the hardware, touch any of its cables or sometimes even reboot it. It has been there since Y2k (or beyond) and just works.
The secret to these boxes is that they are dedicated: they do one thing only, have zero flexibility and no scope for alterations or customsation. But when they are properly designed, from a sensible specification that was implemented by capable people and neither over-sold nor prematurely released (before testing AND bug fixing had been completed) then they are world-beaters. No Patch Tuesdays for them!
However, we IT people aren't used to systems that are stable. We assume that everything arrives broken and that it's 3-5 year lifespan will be spent working around its shortcomings and trying (often: failing) getting it to meet the specification that was originally written on the brochure that the CIO saw, read and bought. The best we can hope for is that these "heavy equipment" manufacturers place as much store in the reputation of their software products as they do in their hardware, and also that they are steadfast in their demands that unqualified IT people don't go anywhere near it.
The difficulty is that to get rock-steady systems, you will never be talking about being at the leading-edge. Instead of implementing the latest and greatest stuff that comes out of a 6 month-old startup (soon to be a 7 month-old foldup or sell-out), the secret will be to not even look at tech that isn't a few years old, has got some thousands (or for the IoT: millions) of units delivered and working and to never, ever make any changes to the thing's external networking environment once it's been installed.
If that means we're going to have to start getting things right at the first attempt and then not changing them, so be it. it can be done - just ask the makers of all those little boxes in the corner.