GSS isn't under Cloud and doesn't have the same deprecation policy. Cloud explicitly states that it has a minimum 1-year turndown on any feature they disable.
> Cloud is still competing with on premises solutions, right? One year is nothing, try ten or twenty.
Not an expert by any means but I would put more weight to Google's ONE year promise over (to give an example) HPE's twenty years promise. I know it is a cheap shot because I am pretty sure HPE will be bought and sold at least once in the next twenty years.
FWIW I am now dealing with a system that is supported by HPE for over 10 years now. Even if they get bought out, someone will inherit those support obligations. I am also in the camp of not trusting Google with anything.
GSS shutdown gives us a year also. I just migrated to GSS a year ago. And they decommissioned they big appliance Google Enterprise Serarch I think it was called.
We were users of the Google Mini Search appliance, went to a 3rd party in-house installed search solution that we did not like and then a year ago went to GSS. We are looking again for something suitable. The best part of the Google Site Search was search fidelity.