Based on these, I firmly believe that traditional ways can never be substituted forby the convenient means.
Excellent introduction - very well presented :)
People living today concernsconcern more on fast foods with the limited time they left with.
... hmmmmmm... is "concern" the right word here???? Is this what you mean;
People today rely on fast foods due the fact that fast foods offer an efficient solution to their busy life-styles.but it is worthwhile looking whether these practices are actually bringsbringing beneficial effects in the prolong uselong run.
... well ... your topic is about whether fast foods would eventually replace traditional dishes. Your opinion is that it wont happen. So, you need to align this para with your topic and opinion. I find it is deviated from that.