Well, each one of mine has a different function. I'll admit I have more than one embroidery machine.
When I upgraded to my 8200 I traded in my old Brother. The dealer told me not to because if I did I wouldn't be able to sew while the 8200 was embroiderying. He was right, so I bought a machine that just sews. My granddaughter has her own machine. Then I bought the Innovis 4000 and what I could get for the 8200 wasn't worth selling or trading. I have 8 granddaughters that some day might use them. A friend was clearing out her house and had an 8500 she gave me.
So that explains all the sewing/embroidery machines.
But, I have a serger, coverstitch, embellisher and blindhemmer. They all do something different. So I'm noting really hording machines. They all have a different function. And believe me, at this time of year I've usually got all three embroidery machines working and sewing on the other ones.