It is fair to say that Radio Hobbyists have always been in the minority, however that 0.1% still amounts to a good 340,000 people, and to put that in perspective, this website has 37,000 members, so we have a good pool to draw from. Regardless, I don't think of Dxing as a popular hobby, and that's probably a good thing, as those ham bands would otherwise be so congested that no-one can use them.
That is my point as well. It's harder to attract people to the hobby nowadays, but it's still doable. Also, you mention SW, but considering that the content has fallen drastically on that band, it's just not the same place anymore.I don't personally use TuneIn, but I have easy access to IHM stations and Audacy stations on my phone, and I have an echo dot.
That is unfortunately the truth. When I began Dxing, a lot of the alternatives we have today just didn't exist. Now that they do, I'm definitely happy to have such easy access, although it does make me wonder if I would be on this forum if I had the Alexa back then. The funny thing, is that humans (like myself) like to defy logic for some reason, and I suspect there will be at least some number of Dxers for the next few generations, or I hope.
Actually you can!

Almost all phones have a FM chip, and at least 2/5ths have a built in FM app. Alternatively, you can download an app that activates your tuner (I have used NextRadio before), or there's an SDR app as well, but you have to buy a $40 dongle for it. You can also practice AM/SW dxing by using an Internet SDR like Kiwi for free. Okay, I'm starting to sound like an advertisement, LOL.
There was a thread on here about San Diego citizens getting "international charges" on their phones without ever leaving the country. I think
@DavidEduardo knows which one I'm referring to.
That's what I said as well.
Agreed with you here. I'm typing from my phone as we speak, and I can play games or scroll Facebook for hours on end. But I was referring to the music options. Have you noticed that SXM tends to repeat itself in the playlist department?