[listic]

I have bought black and white hp LaserJet 1015 6 years ago and it works great; stock cartridge lasted me 5 years and then I refilled it and I am good to go.

It's all about the technology, but I wouldn't generalize to 'professional' and 'consumer'. The base technology, laser printing, allows for high speed, long life of cartridge and printer, and other benefits.

i.e. look at the ssd/flash drive manufacturers; some of them may advertise huge shock resistance. Sure, it is true, but they didn't have to do anything about it. It's all about the underlying technology of mounting solid state parts on the PCB, and surface-mounted parts even further, that provides the benefits we receive. It's all about the technology; the division into 'consumer' and 'professional' is superficial.