Actually the 2 pros are:
1] the new social classes are more commercial in their thinking and life style
2] the new social classes easily reject the lower middle class people without any big reasons
Then the 2cons are:
1] the new social classes are very vulnerable to troubles in life, ie, they are mentally and physically weak than the old class people
2] the new social classes don’t have stability in their life, and they get affected to health problems very easily.