Honestly I'd probably buy a phone without a camera before I'd buy a phone without a headphone jack.
I was sold on the idea of a fairphone but that's a dealbreaker to me. I very briefly owned a phone without a headphone jack (borrowed from a friend while my current one was in repair), having to think of that stupid adapter all the time was hell.
You are asking an infinitely difficult question of why she is so incredibly popular, I don't think I can tell you why she's more popular than, say, Beyoncé. Except maybe that she is more consistent. That said, I'll give you my perspective on why I like Taylor Swift.
I'm a dude and my music taste is pretty diverse but I mostly grew up listening to metal and punk. That said, when I left my ex (for the second time). It felt really good to listen to We are never ever getting back together on repeat. Most breakups I've had, had songs that have helped me through and leaving a toxic relationship... It just felt really good to repeatedly sing those words over and over.
I don't know if it's actually true but I'm a guitarist and I've heard the phrase "Taylor Swift is the Beatles of the 21st century" meaning her music releases currently have the largest impact on guitar sales and popularity. If for nothing else, I respect her a lot for performing live with a guitar. She doesn't do anything crazy but you don't have to have crazy guitar skills to make good music. I personally enjoy learning her songs every now and then because a) they are relatively straightforward to learn but still encompass nice playful elements, b) I am mostly interested in becoming a better singer nowadays and her songs are definitely challenging for me to sing.
Both folklore and evermore are really nice albums imo. Very nice and tasteful music. Last year I had a phase where I was having trouble finding music. I was sick of extreme metal, I was sick of hardcore techno, and I listened to so much leftist folk and folk punk that I grew sick of it. All the music I listened to was always fast, intense and challenging. I just wanted nice songs that I can sing along to with real instrumentation. I realised I don't mind pop music but I like real instruments because they feel more real to me (fwiw lol, please don't take this as hatred for electronics, I also love techno as stated above). Well folklore and evermore offer just that for me. Nice songs with real instruments and beautiful instrumentation. I prefer folklore for being darker but evermore uses more guitar which I also like. My fav songs out of the 2 albums:
Folklore
Evermore
I still want to express that I don't always like her lyric writing. She uses brand names a bunch and I also feel like there are often references to American things which I just don't know about.
Also, while I like folklore and evermore, I find them borderline impossible to listen to all the way through. All the songs basically strike the same mood, it's nice relaxing music, but there's not a big emotional arc throughout the albums for me. I tend to stop listening to evermore once I reach "no body, no crime"... God that song is awful lol.