Openrisk was commenting on how the language is used by practitioners in the field, for which being a LIGO member is directly relevant. It's a mistake to try and mock him for doing that. It just drives actual experts even further away from HN.
My comment goes directly to how practitioners in the field refer to early gravitational detectors .. unless you're of the opinion that David Blair and son are somehow not practitioners in the field?
Harrison's first Longitude clock that worked at global scale was H4 .. the fourth in the series.
The LIGO detector came into being as a direct result of the work on earlier first generation detectors and technology invented there (eg saphire clocks) not only made LIGO possible but there are actual experts that straddle multiple generations of detectors.
It's completely understandable that those that came later and have perhaps only worked with LIGO, count detector generations by LIGO editions. These are not, of course, the same as detector generations.
It's likely a mistake to try and gatekeep others that are aware of the history, as noted that can just drive actual experts away.
