I’m not trying to discount your experience at all, but in my experience the general supply chain doesn’t really work the same way it used to. Things that used to be readily available off-the-shelf have a 4 to 26 week lead time now, including specialty fasteners, electronic components, mechanical components for electronics, etc..

Companies are quoting me 6-9 months for small testing equipment, PCBA’s were over a year lead time, etc..

This is more a manufacturing perspective than a construction perspective, but IMO it’s just more difficult/takes longer/more expensive to make things right now.