Meh. Similar pricing and availability compared to its primary competitor at the time: Arduino.

It was just too unusual in too many ways.

In one way it’s a bit like the Amiga vs the 8088/8086 PC.

"Arduino" is a brand of development boards. The direct equivalent would be the Atmel* ATmega168, and that was widely available through distributors, less expensive, had extensive manufacturer and community support, and was part of a broad product line.

What makes microcontrollers commercially successful is... commercial use. Hobbyist applications are fun, but they don't pay the bills.

*: Microchip hadn't bought them yet