Well, one time I had to wait 8 months for the S-Print (computer) for my machine. Bernina needed to manufacture more and had changed manufacturers. Fortunately the machine still worked, just not very well. I used it for about 6 months of that time then it finally wouldn't let me change stitches or stitch length so I pulled out my trusty old Pfaff and used it until the part came in.
Reasonable would be within two weeks or so. Maybe a month at most.
__________________
My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!