Reports of Google's death seem greatly exaggerated. The still have 95% share on mobile and 84% on desktop, the latter because Microsoft can make Windows try to force Bing upon you. Google probably have like 99% of the profits in search.

The idea of sites making their data inaccessible is not new. Experts Exchange is still out there siloing the answers but Stack Overflow has all the market share though being open. Google will be fine.