[hwh]

That is not true. See https://github.com/littlefs-project/littlefs/blob/master/DES...

Sorry, as a commenter on this pointed out, the comment I was replying to was probably talking about eMMC. For which indeed no wear levelling is specified by the JEDEC standard - it is a standard that defines the communication protocol between a device and a host system. Newer JEDEC standards define the interface to access vendor specific "health reports", the actual method of wear levelling isn't regularly disclosed by vendors.

[phs2501]

I think the GP was commenting on the lack of specification of eMMC wear leveling, not Littlefs.