What the heck happened to personal recommendation between friends etc and towards guests staying in their accommodation?
A good question.
I can only speak from personal experience, but if Mrs Ronin and I are "on the road" to somewhere (on the way to, on the way back from or during a holiday together), we might decide we want to stop in an unknown town or village for lunch (or afternoon tea, if Mrs Ronin is feeling fancy). If it's a multi-day journey, we might be overnighting in a Travelodge or a Premier Inn, again, in a town unknown to us. If we already have a holiday "base" it's more than likely going to be self-catering and there might not be any other guests around (or at all).
At this point, friends in West Yorkshire, London, Cambridgeshire, Cumbria etc. are not immediately available and (likely) not knowledgable about whatever part of Pembrokeshire or Country Durham or Inverness-shire we're passing through, anyway.
So, we generally resort to Google Reviews (via Google Maps) and TripAdvisor to find a venue that fits what we're both looking for.
We might do the same if we're in the Neckar valley or Istria or Burgundy.
I don't disagree that, if we're exploring somewhere on foot, or if we're staying in a Youth Hostel, it's definitely the best option to ask people.
But that's not always possible if we're en-route to somewhere (and deciding which village or small town to stop at) or else, perhaps, in a relatively remote self-catering place, deciding on which direction to head out in for the evening - off the top of my head, I can think of several times this has been the case: in Snowdonia, in East Lothian, in Cheshire, in the Vale of York...
These are times when, in the absence of face-to-face local knowledge, it's useful to be able to turn to a pocket-reference.