What are 2D codes?

2D codes feature built-in error correction, allowing them to restore data if the code is damaged or smudged.
Mathematical error correction (Reed-Solomon) is employed for data restoration.

Disadvantage of 2D codes

2D codes have no backup when the data is unreadable

Barcodes typically have readable characters at the bottom, in case barcodes are damaged/missing.
Operators read the characters and input the data with a keyboard so that it does not affect operations.
2D codes have a very large amount of data, so readable characters are not added. When the 2D code is too damaged for scanning, there is no means to read the data and that interferes with operations. (It is possible to add readable characters to 2D codes, but it is not realistic to let personnel type more than 100 characters.)
When you use 2D codes, you need to create a system that can provide measures when the 2D code is damaged.