From an airshow in the early 2010s where someone was thumbing through the NATOPS manual. Can get a sense of some of the differences.
That panel is just so much legacy 'suck'. Analog BDHI, 1960's era CDI (ID-351) is just absurd/obscene.
We suffered through this in the T-34C being instructed with backwards ass cockpit displays that included the RMI and CDI and seperate displays with yet another TACAN DME display.
The 46 NATOPS is dated 2009, and yes has what some of us would call a modern avionics suite.
As far as "legacy suck', that is a matter of opinion.
The T-34C was a luxury (digital and A/C) compared to the T-28C (which I wouldn't trade that flight time for anything).
OMG, RMI and CDI on separate displays?... wah wah wah.
I remember the 46 having an NDB (no not an ADF) with a BFO (beat frequency oscillator) that allowed you to move the antenna and listen for the null in a tone.
New, glass, digital, etc. etc. is great, don't get me wrong.
But you knew you had a handle on understanding the system when you could fly a holding panel with only one VOR/TACAN or ADF. Having to switch back and forth between the two stations that identified the holding fix.
My personal opinion is that the initial training aircraft should be a simple as possible, with the minimum of glass on the panel. Allow for learning to fly, not learning to fly the system.
Back in the '70s, even going from a TH-57A to a TH-1L (HT-8 the HT-18) was quite a transition, done in a controlled training environment.
Now the SNA spends as much time (maybe more) learning systems, rather than flying.
Yes I'm an old gray aviator, but basics are basics, and are best taught without glitz, glamour, and glass.