By maintaining >50% engineering staff for so long, Google has inadvertently created a fascinating study of the interplay between two spectrums: autistic and psychopathic. More on the similarities and differences here, namely aspects related to empathy: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3826592/ It seems of no coincidence that so many of Google's social products have misfired - due in part to this interplay…
That has nothing to do with why Google+ failed. Or Allo. It's because everyone was already using Facebook and WhatsApp and those have extreme network effects, and Google+/Allo were basically the same thing just owned by a different company. You don't need to invoke autism to explain it.
The network effects statement is both true and relatively unimportant, considering prior social and chat networks had periods of extreme dominance before Facebook and Whatsapp, and that others will in future.
All despite network effects.
Apologies if I came across somehow invoking autism as an explanation for business failure. I certainly applaud initiatives such as Dell's, and we can easily find examples of brilliantly successful products and services created by those on the spectrum.
I mean to suggest that psychographic profile differences between the large tech workforce and their potential customers may be enough to contribute to product failure. This is particularly so if the products require empathic understanding, a known problematic for both the autistic and psychopathic spectrums.