But who is actually making big prints? I've never done a singe one and likely won't do anything bigger than a photobook page. That's exactly my point about dslr's becoming redundant for more and more users.
I own a 500€ low end dslr and it feels worse than my 500€ phone that I carry with me anyway.
I used the example of big prints (big here means bigger than A4) because it's the most immediate demanding application that I could mention. With a phone you also don't have the resolution to spare to apply perspective correction to photos of buildings, dynamic range to deal with less than gentle, bright scenes, etc.
That's probably the basis for my impression. I basically only use auto and am not educated enough in photography to use manual mode in most cases.
Increasingly I'm happy enough with a phone (giggle pixel 1 which has a halfway decent camera + software support) for walkabout use, but the benefits of a small DSLRs for holidays or other special events is hard to beat.
Leica M rangefinders still have the best controls for non-action photos, which is a bit sad for a design from the early fifties.
I have a 3 year old print on my wall of my kids, taken with an iPhone 5, cropped from a horizontal framing to vertical, and then printed at 11x14". I did a bit of post-processing on it to sharpen it up, and it looks fantastic (until you look at it from less than a foot away). I need to repeat the process with the X's camera. ;)
Modern kit lenses are optical marvels. A couple of decades ago you couldn't buy a lens with the quality and versatility of Nikon's 18-55mm kit lens.
You aren't even really disagreeing with the OP. You could have said: "You're right about the 99% of non professional use cases (sharing on social media and the occasional small print), but not the 1% case of big prints.
And for what it's worth, I made a photo book from Google photos with pictures all taken from the pixel 2. It looked great.
It should be noted this is only true if you don't zoom in at all, since no phone camera has optical zoom :(