AVR is so old school now and has been for years. AVR only lives on because of the hobbyist, like Arduino. Professionals have switched to Cortex M0, because of size, price, and power consumption.
Old school yes, but the hobbyist market it only a drop in the bucket. Around 1,000,000 Ardunios have been sold total. Atmel doesn't give numbers, but the 8-bit MCU market is around 6.7 billion units per year, AVR is a large share of that.