I would say human performance as well
Visual effects
The cooling body means you go to sleep so have a hot shower works.
It strange when you go back to it and use it.
Sometimes years afterwards.
I was in the middle of Saudi at FL230 with no nav aids within 400 Nm's and the GPS got taken out by jamming due to the Israelis practising taking out Iran. No notam as you might expect. EFIS, FMC and the machine didn't have a clue where it was. No radar cover so we just dead reckoned it until we could pick up the VOR at destination. We were only 2 degrees out on the expected radial to boot. All done with a calculator and high level enroute chart.