Almost all true, but don't forget the venerable Reims F172, which are just C172 built in France and they are all anti-corrosion treated (in contrast to the US built, where that was a paid option).
One thing surprises me - if you compare say a 1966/1967 F172, G or H, with a brand new C172SP, what do you get?
- It is 180hp 4-cyl. IO360 vs. 145hp 6-cyl. O300 - the old one definitley runs a lot smoother.
- It is 108kts cruise vy 98kts cruise - 10 kts advantage for the new one.
- It is 35LPH vs. 27LPH - 8LPH, or 2GPH for only 10kts faster.
- It is Avgas mandatory vs. Mogas possibility - advantage the old one.
- It is G1000 vs clocks - is the blingbling world really an advantage?
- It is about 100kg carry load less on the new one.
- It is 270k real money vs 30k if you go for a GNS430 equipped old.
Is there enough benefit in a new one to justify + a quarter of a million? This is about the equivalent of the Total Costs of Ownership for a whole one TBO for a O-300D.