Yesterday I got a cable modem, and on the back of the modem there is a small sticker with the name of the default SSID, which looks like Vendor-A11 and the default Pre-Shared Key, which is a long password containing both numbers and letters.
I found it convenient that when I want to connect some device to its Wifi, I just need to have a look at the rear of the modem. But then, while doing some research, I saw that it is recommended to change the default SSID. For me, it seems that what comes printed on the sticker is unique to each device sold by the manufacturer (both the SSID and the key).
Then I did some research on the web and, while there are many websites that tell you to change the default SSID (and some even go as far as saying you should change it often), all of them failed to explain what is the purpose of changing it.
Isn't doing this just some sort of security by obscurity? Isn't setting WPA2 with a good password the most important? Just for reference, I have disabled WPS too.