Most have forgotten that the Internet Engineering Task Force originally recommend OSI with full implementation of all 7 layers of the ISO model. Of course, no one wanted that ... You got what you asked for !

I worked for a Fortune 100 engineering/manufacturing company as a Sys Admin for over 20 years. In my last position I worked in a small niche of the company outside of major machines and applications but still in a place where a system problem that lasted more than 24 hours could shutdown multiple factories. My immediate management did not want to know anything. My favorite quote was, "The best you can do, is to not let my phone ring with a complaint !" Any management above that level (incorrectly) assumed that the PCs on engineers desks were all that was required for them to get their work done when in fact all of their work was conducted on servers under my control. Worse, the servers in use averaged between 8-12 years old, some running "retired" OS's, most of which had no hardware maintenance contract as we had "spares" or could reconfigure them with less CPUs/memory until replacements could be obtained from the used market.