Hi, i've seen some market sizings which included not only the replacement rate (e.g., current number of smartphones in the US x replacement-rate) but also a growth rate.
How important would you say it is for market sizings to include the growth rate? I mean i can understand it for "new" products like smartphones or tablets, in which the penetration rate might increase. However, would it also be important, for example, for mattresses or diapers?
Thanks in advance!