I have always used my arduino to program the tiny, but! if I were to sit down and make an arduino like board that would sit on my desk and be used for more for daily experments I would like to use one, less clutter and fragile connections
but on the other hand that is why I have an arduino, and most of my stuff is hashed out on it first, and then brought over to the tiny when my application calls for such a thing
or in other words 50/50
I do appreciate everyone's hard work on these chips, the tiny 84 is great for many applications where the 168/328 is overkill and physically too large, it fills a nice space