I bought a Nikon DSLR (Most expensive purchase till then), thinking that I would take it around whenever I go out for fun trips.
I did take it out often. I had some great pictures with it. No problems, not even today.
But after I got the Pixel 2 XL, the pain points with DSLRs are obvious for regular shooting. They need to be charged, the SD card needs to be put in a computer to transfer files, and they're bulky so carrying them is a problem.
So now, when I want to take a nice quick photo, I wish I had my DSLR, but I take the photo with my phone anyway, and I don't think much about it.
I'm not saying DSLR are going to be completely irrelevant. But they're getting so close to the ideal picture quality for normal photos (i.e. no shutter speed or focus requirements) they're just fine. And the problem is they're getting better.
They won't replace the full-frame cameras with have large ecosystems around them, but they'll make people like me think twice before buying a DSLR.
This is true for all phones, no matter the cost. They simply can't compete with much cheaper but dedicated cameras for one vital reason: the sensor and lenses sizes plus noise. Phones need to be thin and they can devote only a small part of their area to a sensor plus lens. That lens also must follow a certain width/depth ratio to minimize image distortion, so if it's thin it also must be narrow, followed by a narrow sensor as well. Since a narrow sensor is exposed to less light than a larger one, to obtain the same level it has to be pushed to higher sensitivity to cope with lesser light, hence the higher noise.
The picture taking I do on my phone is very different I do on my dslr. As for battery life maybe I'm not shooting enough but I've literally never "had" to charge it. I don't even bother bringing the charger anymore, the damn battery refuses to die. I just charge it after a trip or once a month at home. Fat SD card means same for memory.
Are you shooting in raw and editing your photos?
Yep, I do the whole works. All of them in RAW, spending an hour or so editing in Lightroom (with favorite presets), have a flickr (like every other DSLR owner). But it stopped being fun after seeing that so many people do the same 'artistic' stuff, it doesn't feel like I'm doing something 'worthwhile' anymore. Now I just want to take photos and videos with friends. I find them more important.
I used to care about the right focus, shutter speed etc. But with a phone, if you use the portrait mode, you get something like f/1.5, and if you don't, you get something like f/18. So that almost takes care of the focus problem for a lot of cases.
When it comes to shutter speed, I use the high shutter speed when there are faster moving objects. That's a problem with a phone, but with enough photos taken quickly, one of them usually turns out good. People use low shutter speed only for long exposure shots like nightsky, waterflow, etc. which isn't a 'normal' photo.
Low light is one place I guess where a phone can't exactly do as well, but as I said, it just needs to be good enough, and not perfect.
About the battery of DSLR, often I don't take it out anymore, and between uses, the battery is so low that I have to charge it. So it leave it, and next time, its pretty much dead. Poor maintenance, but it again ties into if it is worth it.
Unfortunately for DSLRs for my purposes, the joy of shooting one is vastly outweighed by the inconvenience of transporting it.
Once ICEs are dramatically less convenient than electric vehicles, I suspect I’ll give up stick shift too. Hoping that day is a long way away.
Going beyond that, innovative ideas light the extreme mult-lens systems from Light start to offer features a DSLR can’t reproduce in a form factor closer to a smartphone. Disruptive innovation comes from flipping orthodoxies and that is exactly what we’re seeing.