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I'm a back end developer and don't have much experience with web technologies, so may be some one can enlighten me. Have we really come to a stage, where what Facebook has done after billions of worth investment and thousands of people working, can be cloned with a open source technology in hours? >>I can make a clone of any complex app out there in the web in a matter of minutes/hours. Again how is this possible. Or…
I'm a beginner web developer and I can clone facebook in a few hours. In its core, the app is just users who can friend each other. Add AJAX to that... and tada, something that resembles facebook. Scaling the app to be very reactive, available to millions accessing it at the same time, and with near 100% up time is where the hundreds millions of dollars go. (and all that data mining)
If you mean "mimicking on or two of the features" I'm with you :)