No, you didn't misread that title--after nearly a year since the last one, Nintendo has put out a system software update for the Nintendo 3DS line of handhelds. Currently, neither Nintendo's European or North American websites are acknowledging the update, but Nintendo of Japan has, and while it isn't exactly the classic message we're used to, the main focus of the update is "improved system stability and convenience". As for custom firmware, it appears that the latest version of Luma3DS is still working on the newly released 11.15.0-47, with users reporting that the firmware release merely exists to update the 3DS browser's SSL security certs.
Major changes due to the update to 11.15.0-47J
[New Nintendo 3DS / New 3DS LL / New 2DS LL / 3DS / 3DS LL / 2DS]
Improved system stability and convenience
Some functions are added / corrected only by updating by network download.
The game card update does not include some changes.
For updates of main unit functions before this,Nintendo 3DS system version change historyplease look at.