The fallout of this means that all 'modern' technology is operated upon by tech-priests, who blindly perform rituals upon equipment to ensure it's 'machine spirit' is satisfied. This ensures that the equipment will properly function. All knowledge as to how the most advanced equipment operates is lost - all that's left is how to produce some of the lesser pieces.
Caches of templates to produce standardised equipment are highly treasured. These ancient and supremely advanced caches produce extremely detailed designs for the entire supply chain required to build a single item. A template to provide for a slightly sharper knife is as desirable to the Imperium as another template to provide for a 55 Meters tall armoured war machine.
Countless attempts to improve anything in that ancient code base failed since by that point, every little quirk that browser exposed was depended on by some essential system running a power plant, hospital or internet core infrastructure.
So the archeologists rather try to find even more quirks that can be abused for performance.