If you're referring to me, Tom, I'll reply to the passive aggressive comment.
The photo I took is of a semi-modern US Navy example of the F-5N. Ex-Swiss to be specific. It has the newer radio stack, radar screen, but retains much from the older F-5E fitting. My point was that the devs have taken bits from the old F-5s, mish-mashed with some modern updates from various militaries. A working HUD is possibly from a Brazilian F-5EM or Chilean jet?
The ex-Jordanian F-5Es that TacAir acquired back in the early 2020s, are considered to be the most modern avionics wise, with complete glass suites. So much, that NAVAIR has contracted them to upgrade the existing F-5s in the USN and USMC fleet.
So yeah, I've done some research.