Yes, SIMMs were used as system RAM before, but they were frequently used as L2 cache also. L2 cache was at times soldered onto the motherboard instead, but that was not always the case.
I didn't mention any of their competitors, because this isn't about them. If this article was meant to discuss the major companies that produce firmware, then it would make since for me to discuss them, but it isn't. It is only to discuss the AIM, what areas of business they are in, and give an overview of the company. Like any company they have had a few problems over the years, but nothing particularly recent or worth mentioning. If this was a complete overview of the last 30+ years, then I would have mentioned those, but again, the idea is to reintroduce you to the company. A little info on the start of the company and how it started to grow, an achievement or two that was significant, and a look at current products. Going into more detail than that would only serve to make the article longer than most people would want to read, while providing no real useful or relevant information. Something which you would read and think "meh" isn't worth taking the time to write, and isn't worth asking our readers to take the time to read. Why would I write something that is so dull and uninteresting that the only thing the audience would have to say about it is "meh"?