There are still times when you want Bluetooth. For example when you want to pair with someone else's Bluetooth speaker at a party.
There is also value of 3.5mm input on the speaker - it reduces battery drain a lot (useful when camping for example, mine lasted longer almost 50%). All three BT speakers I was able to find in my flat (different brands) have the line-in connector. Checked just now because I was curious.
Yes, fortunately including an aux port doesn't preclude also including Bluetooth. To quote the article:
> It has NFC for pairing with wireless headphones, but it also has a headphone jack so you can choose. Shock of horrors
I like aux because it's easy. It just works.