I'm using my ink jet to decorate my home with my own photographs. Borderless printing on high quality thick glossy photo paper, photo rugs and other types of paper is crucial and completely impossible with new or old office printers. The fidelity and color saturation just isn't there. Even the newest color laser printers are so far behind that they're unusable for this purpose.
I'm not saying it doesn't work for you, I'm saying it doesn't work for me and answering the question "what is one missing out on".
Yep, that's totally fair. I replied in a sister response, but I'll admit that my response was probably a bit reductive and a bit too me-centric.
In fairness, I do think a lot of people really just have a printer around for the same reasons that I do, which is to print out primarily text documents, in which case I don't think most people would be missing a lot getting an old black and white laser printer. I have seen people spend a lot of money on printers and cartridges just to print out three pages of text every couple months, and those people would probably benefit from a cheap, old, black and white laser printer.
I'm not saying it doesn't work for you, I'm saying it doesn't work for me and answering the question "what is one missing out on".