First of all, I know nothing about an embroidery machine!
However ... when I was at my dealer recently, I met a lady who had purchased the Bernina 830 (combo) and had traded it in for an 820 (no embroidery) and an embroidery machine. I asked why? ... she told me embroidery takes so long to work thru the design, that she can get a lot of sewing done, while that happens! She's close enough that if something goes wrong, she can deal with it. Otherwise, with the two machines, she can be doubly productive!
Made total sense to me ... and if I were ever considering an embroidery machine, I'd take heed of that, and at least consider how that factored into my end decision.