It is very disturbing to hear people talking about how uber/grab are killing taxi. What people don't understand is that no doubt there are impact but do people really know what is the impact?
Touch your heart, how often do you really take taxi in the past and how often do you take uber/grab now? I bet some people here don't even take taxi for the past 10 years but is currently using uber/grab due to "promo code". So technically did taxi lose customer ?? I also dare say that many passenger are taking uber/grab due to the promo code and cheaper fare (uberpool and grabshare).
The key problem that hit the taxi industry hard now is the amount of taxi driver jumping over to uber/grab. This result in empty taxi sitting there doing nothing. Taxi driver are also not given much incentive unlike uber. I once spoke to an uber driver and he told me that there were certain incentives from uber. The more attractive one were cheaper rent and incentive for driving on the road with app turn on (even w/o passenger).
The promocode are to effective in luring customer but how long can this last? No doubt grabshare or uberpool are cheaper in fare but they are meant for people who are not rushing for time. I believed once uber/grab promocode craze are over. The taxi business would be back and most likely with new look. Maybe new scheme for taxi driver?
Thus over the long run i believed CDG would climb up to where it used to be. We also have to remember in mind that taxi are not their only business.