As a millennial I think I was probably in the first generation who first started buying vinyl not because we had record players, or preferred the sound of vinyl (although some claimed to), but because when most of us came of age during the time of iPods and mp3 players, if you were going to buy physical media to support an artist, vinyl was probably your best option.
CDs were rapidly heading in the same direction as tape (and continue to), and both were less romantic and felt in many ways a less "authentic" format than vinyl did. The physical aspect of vinyl has a beauty that simply isn't replicated by the CDs optical storage system or the tapes magnetic storage.
Another thing I'd add is that I have a craving for analog more and more in my life these days, especially in music and other media formats. Everything is so polished and so clean that the novelty of the quality has worn off, and everything around you instead feel increasingly unnatural.
As an analogy, I've always thought it was interesting how awful the hologram quality is in Star Wars given they have extremely advanced technology otherwise. But if they were in perfect HD although they would be better from a functional perspective, there would also be something less romantic about them. It's hard to put my finger on why I feel that way, but I think the same is true of lots of technologies. When street lights are replaced with LED lights, they are more functional, but they're also less romantic. Or if you look at food packaging from the 50s, there's something romantic about the materials, colours and print used vs today's plastic packaging and digitally designed labels.
Anyway, I guess this doesn't surprise me at all and I think it totally makes sense, although I suspect most people don't even really rationalise why they're doing it. Vinyl just feels right because there's something more authentic and real about the format.