Some very high percentage of mobile devices, when using mobile data, are on IPv6 and preferentially connect using IPv6. I think 80% of Meta traffic is IPv6.

Lots and lots and lots of people use IPv6.

I have to say though the BOFHesque attitude shown in this thread by a number of people has convinced me never to touch Alpine linux. I can already see exactly what sort of attitude towards users and input the developers encourage and that sort of ivory tower shit has absolutely zero appeal.