Why do people still bother with command line Windows?
CMD, also known as Command Prompt, is the command-line interpreter in Windows operating systems.
cmd.exe interacts with the user through a command-line interface but not a graphical users interface (GUI).

The command line Windows is almost 50 years old, but its still being used by many users.
Why do people still use command line commands in Windows 10/8/7?
The command lines are standardized thanks to POSIX.
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Some users are favor of the benefits of using command line commands for the appropriate tasks.
Compare to using GUI to do some operations, using CMD is often faster and agile.
Here we introduces two simple ways to quickly runWindows 10 Command Promptas administrator.

those related to hard drive partition management and Windows 10 repair.
Dir.you could typedirin the Command Prompt window to list files in the current directory.
it’s possible for you to use thecd commandto change the folder directory in Command Prompt.
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Then if you want to access thesystem32folder located inC:\Windows, you should typecd windows\system32, and pressEnter.
For instance, if you want to change to D drive, you could typed:and pressEnter.
Diskpart.The diskpart command is used to create, manage, and delete hard drive partitions.
Convert.Convert FAT to NTFS.
Copy the contents of one disk and place them on another disk.
Write a newboot sector.
Write a new boot record for adisk drive.
Format.Wipe a disk driveand prepare a disk drive.
CHKDSK.you’re free to use CHKDSK command line to diagnose and fix hard drive errors.
The command line is like this: chkdsk c /f /r.
You should replace c with the drive letter of a specific partition.
SFC.The System File Checker can help detect andrepair corrupted or missing system files.
DISM.The DISM command-line tool is used to manage and repair Windows images.
For more Windows command lines, you may refer these two posts below.
They list all the basicCMD commandsin alphabetical order and provide explanation of the usage of each command line Windows.