Google Books Search Functionality Significantly Reduced Over Time

I used Google Books extensively ten to fifteen years ago when working on a biography of a colonial-era printer.

You could get full access to many if not all nineteenth-century and early twentieth-century books (including older journals).

Keyword searches within a given work returned ALL relevant pages, and you could often scan/page through entire works.

I have watched the gradual degradation and cutting off of this 'service.'

In recent years, search results within often return just three snippet views, with no chance to see full or adjacent pages.