And speaking of specifications and models, I found it really annoying with Cannon and most other printer manufacturers was their lack of descriptions for what their particular model printers could do or the cartridges used etc. and what determined the particular model number. A comparison list would have been greatly appreciated.
Many years ago I worked in a car stereo store. And I learned why a company like Canon has so many models, with different features, and why they aren't terribly interested in clearly explaining the differences to potential customers.
The reason that they have so many models isn't so that you can find the exact model with the exact features that you want. They have so many different models because they want to have a different model for different retail channels (e.g. discount stores, computer stores, online stores, etc.). That way all of their different retailers aren't competing directly with each other.
If one retailer discounts, and another doesn't, the latter retailer can say "Well, they aren't selling the same model. Our model is different/better." Also, if all of a company's various retailers aren't directly competing against each other, there is little to no incentive for any of their retailers to discount what they are selling heavily. All of their retailers make more money.
When I was selling car stereos, Sony almost destroyed the entire car stereo market for themselves. They gave the same exact models to any and all of their retail channel partners. This caused all retailers to discount Sony car stereos deeply to compete with each other. As a result, no one was making money selling Sony car stereos. Eventually, because of this, no one wanted to carry Sony's car stereo stuff at all anymore. It took Sony years to come back in the car stereo market.
I once was looking to purchase a Panasonic vacuum cleaner. So I wrote to them asking for model information. I think that they mistakenly confused me with a distributor or a retailer. They sent me back a list of all of their vacuum cleaner models. It was stunning! They had like over 100 different models, each one only a tiny bit different. Sometimes the difference was only cosmetic! That was how far they were willing to go to do what is known as "protect the market."