Everyone with a Mac had an ImageWriter
printer; the scanner attachment was, by far, the cheapest way to add scanning capability. Many people bought them to add the capability, not because they needed them already.
A little later, the LaserWriter printer became the first generally affordable laser printer. But it was affordable only if you were rich or had a business case for it. The sub-thousand dollar laser printer took quite a few more years.
And even though networking was envisioned from the start of the Mac, Apple basically had to rush to finish AppleTalk networking in time for the release of the LaserWriter since it was so expensive it was assumed the only way anyone could justify the purchase price was to share it with an office workgroup rather than connect to a single workstation. It took 2 more years for Apple to finally introduce file sharing over their own network.
A little later, the LaserWriter printer became the first generally affordable laser printer. But it was affordable only if you were rich or had a business case for it. The sub-thousand dollar laser printer took quite a few more years.