Differences between Microcontroller and PLC

As'salam o alaikum
Its a very common question of DAE and Engineering students that what is the difference between microcontroller and PLC (Programmable Logic Controller) ?
According to my study and work there are some following differences between MC (Microcontroller) and PLC.

Microcontroller:

• Microcontroller is single chip device (having PU,RAM and ROM)
• its special purpose device
• approximately absolute from industry from Primary (Major) application
• Microcontroller can't work alone (because its single chip device no any basic circuit)
• Microcontroller can work in rough environment 
• Low performance at high speed processing and large interrupts
• Microcontrollercon't scan it all inputs at a time for output 
• Instruction execution is line by line 
• Mostly required to unplug Microcontroller from circuit for programming (but Some burning devices have ability to Program Microcontroller in circuit programming like Pik kit)
• No indication of active I/O at all 
• For simulation of Programming code for practice use Compiler first like MikroC then use Proteus for Simulation
• Programming of microcontroller is in form of (algebra to write for I/Os, Conditions and actions in sequence. 

PLC (Programmable Logic Controller):

• Programmable logic control have industrial domain
• Special purpose controller
• PLC industrial application device
• PLC initially develop to replace Relay logic hardware
• Wide adoption and use due to its Ruggedness and ability For rough environment
• Good for real time operations
• PLC scan and action time is very short
• PLC instruction execution is parallel (Scan all the inputs at a time and Produce output same time according to input status.
• In circuit programming ability
• Indication of active input outputs
• Working display at LCD
• For programming & simulation practice LogixPro Software Free source is available which is compiler as well simulator
• Proggramming of PLC is in form of symbols & blocks of I/Os, just connect, compile and run 

I noted these differences may some professionals not agree So plz Comment me with logic.

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