it doesn't have the stuff like MORE FLASH MEMORY that we wanted an ARM to have
Well, this chip is meant to replace the 8-bit micro available in DIP package. This chip may not have much memory, but they (NXP) may release another with more memory. Memory has nothing to do with the ARM architecture. Our ATMEGA328 has the same amount that does not bother us.
there's no growth path to another DIP chip that does have more flash...
This is not the end of anything. ARM is not limited with this particular chip. We might have another DIP with a better memory or even another SMD ARM from a different vendor. Since the architecture is same, ARM, we won't have to pay very extra efforts. At anytime we can switch to an SMD version of another ARM. So nothing is in stake.
How do we think 8-bit DIP AVRs have a better growth path! AVR will remain, but a better AVR will always be SMD. So whats our problem to jump into ARM. It is at least learning a new platform with a DIP. And we don't need very specialized tools/skills to deal with a DIP, all are available at our home. We should not compare everything based on some negligible aspects. Its not AVR vs ARM, its just riding a new Motorbike. Even if it does not have a better memory still it is ARM, and ARM has a growth path. Its the future. Not only this. It has a better clock speed, 50MHz at least. And Arduino is not going to kill their UNO boards with AVR chips. It will just be another weapon in their arsenal. So whats wrong with it!