Why Binary choices have (n)varchar(max) on DatabaseBackup parameters?

[SysDaemon]

Declaring a variable with maximum space, when the choices are binary

Hence, the choices will be "Y" or "N", why declare nvarchar(max) on these parameters?

[olahallengren]

This was a decision long time ago and then I have followed this standard.

Here are some of the arguments as I recall them:

• "Y" or "N" is more easy to understand than a bit column with 1 and 0.
• For other string parameters (e.g., BackupType) using a non-max length could be a source of bugs, as the strings are automatically truncated. Because of that I standardized parameters and variables to nvarchar(max), and that also included the "Y" or "N" parameters.

It could be argued that a bit column is a more natural choice for the "Y" or "N".