I give up.

We can only but pray...

NMEA should have used a SEALED, WATERPROOF, SHIELDED connector, STANDARD
to
all devices from all manufacturers to eliminate RF interference.

Which NMEA 2000 offers.

Stupid...really stupid.

And meanwhile a great many improvements came along, utilizing the NMEA-0183
standard. Things evolve, and those that recognize change has costs have
benefitted greatly along the way. Sure, plenty of vendors have done a
less-than-ideal job of implementing it, but that's true for everything.
Meanwhile we've evolved away from purely proprietary cruft, that alone makes
it worth the hassles.