I don't understand why people use the attiny85... The Atmega328 based boards have far wider software support in the arduino ecosystem, so you will typically be able to prototype a project in minutes instead of hours, and the dev boards cost the same, but the 328 ones have more of pretty much everything.

The only benefit of the attiny seems to be that you can save a few millimeters of board space, but if that's your concern there are plenty of far smaller, cheaper and more capable microcontrollers in BGA packages.