This has been a project I've wanted to do for a while, since I had the time I got around to it. Typically with the ATtiny I find myself using the same basic circuit over and over again. Just to simplify my life i decided to produce that "same basic circuit" as a PCB. The idea is pretty straight forward, add an ICSP header and a voltage regulator then breakout the GPIO pins.
In reality I only undertook this project due to how ridiculously cheap getting prototype boards in hand has become recently. From JLCPCB 50 of these boards can be made for $10 so there aren't a lot of downsides to something like this that only saves me some time and trouble. Next update will be when i have these in hand!