Why RMAN tool is used to take backup

We know that backup of a database can be taken through OS command or by using RMAN. Most people want to use RMAN or feel more flexible to use RMAN. The features that make RMAN better than other backup methodology are as follows.

1)RMAN came with oracle and it is free to use.
2)RMAN becomes simpler day by day. The simply BACKUP DATABASE will backup the database.
3)When use RMAN you are 100% sure that database is backed up.
4)With RMAN you can validate a database before backup and also validate a database after taking backup.
5)RMAN maintains a central repository where backup information is kept. So we manually get rid to remember the backup information of database.
6)RMAN is the only tool that supports incremental backup.
7)RMAN improve performance in time while taking backup and restore database.
8)RMAN encrypt data and also use compression of backup.
9)Can take backup parallelly and also restore operation can be done by parallel.
10)Various reports and querying facility through RMAN.
11)No extra redo generated when backup is taken..compared to online backup without RMAN which
results in saving of space in hard disk.
12)RMAN is an intelligent tool which help us to decide various query like which files need to take backup, which backup is obsolete, which backup is expired etc.