You are correct: 1985 vs 1991. My bad. I just heard about AIM at the time, whereas ARM was relatively unknown (well, at least to me ;) until the rise of mobile.

You are correct: 1985 vs 1991. My bad. I just heard about AIM at the time, whereas ARM was relatively unknown (well, at least to me ;) until the rise of mobile. Edit: It’s a bit confusing because ARM the architecture is older than ARM the company. But yes, both precede AIM/PowerPC. My main point was that mobile made RISC ubiquitous.