I don't have the time to discuss this at length, but NTSC's unfortunate
reverse-acronym was the result of poor studio standards, and is not
inherent in the system. PAL incorporated phase alternation to partly
compensate for transmission problems (non-linear group delay)
in Europe.

IIRC, nowt to do with studios, but the transmission process. Hence
the tint [sic] control on NTSC sets which is absent on PAL ones.

The implication of "never twice the same color" was that there was
something inherently unstable in the system.

The US had high-quality microwave transmission systems with
excellent timing and group delay characteristics. Europe did not.

Are you referring to the studio to transmitter links?...

No, when I say "poor studio standards", I'm talking about such things as the
failure to set up cameras correct, keep a close eye on burst phase, etc,
etc, etc. Garbage in, garbage out.