It probably would have turned into a customer service line for all of their products they notoriously fail to adequately support.

This is a good theory and may have been an actual motivation to shut it down.

This isn't what goog-411 was. You would dial Google's 1800 number, and then tell a voice prompt the name of the business and location, and google would try and automate looking the business up and then route the call for you by ringing them automatically. In the pre-smart phone era, this would allow you to call a business with just your dumb phone. GOOG-411 is completely worthless in the smart phone era (discontinued in 2010).

It's worth mentioning that goog-411 enabled at least a couple very niche internet subcultures in the early 2000's. When skype brought in free 1800 calling, GOOG-411 could be used as a way to dial any business with skype for free (so no credit card info associated with an account). Think Xbox live lobbies but its a dozen kids on a call, muted, and taking turns unmuting to prank call (harass) businesses all day. I watched a childhood friend spend a summer doing this with a group he met playing mmo's/forums, two of which ended up making it as famous streamers over a decade later. I imagine this experience is very common for a type of kid that grew up online in a certain era (mw2), and google could probably see the tool was garnering a disproportionate amount of abuse

("Do you guys have battletoads?")

This isn't what goog-411 was. You would dial Google's 1800 number, and then tell a voice prompt the name of the business and location, and google would try and automate looking the business up and then route the call for you by ringing them automatically. In the pre-smart phone era, this would allow you to call a business with just your dumb phone. GOOG-411 is completely worthless in the smart phone era (discontinued in 2010).

It's worth mentioning that goog-411 enabled at least a couple very niche internet subcultures in the early 2000's. When skype brought in free 1800 calling, GOOG-411 could be used as a way to dial any business with skype for free (so no credit card info associated with an account). Think Xbox live lobbies but its a dozen kids on a call, muted, and taking turns unmuting to prank call (harass) businesses all day. I watched a childhood friend spend a summer doing this with a group he met playing mmo's/forums, two of which ended up making it as famous streamers over a decade later. I imagine this experience is very common for a type of kid that grew up online in a certain era (mw2), and google could probably see the tool was garnering a disproportionate amount of abuse

Would that have been so terrible?

If you're a company trying to make as much money while spending at little money as possible, yes.

I'm still using 2 RSS readers (Inoreader and TheOldReader) that I switched to after Google Reader shut down.

Aha! Minor blast from the past. I just realised my a/c might still be alive on there and there it was. I think I logged in after 3 or 4 years. Old Reader. I think I had deleted my a/c on Ino Reader. I used to follow couple of niche Hindi blogs and they shut down years ago; some Engish language as well (from all over the world). Most of them were anon. I kept coming back for years but they were gone. That's what killed the RSS/blogs for me, not the demise of Google Reader. It stopped being the place I knew in my own individual/idiosyncratic way.

I suspect something similar would happen to podcasts for me, maybe sooner than I am hoping for. And podcast player apps.