Like others I do see the advantages of using the same machine through out a project but as for the bobbin thread well that's another story.
I have an embroidery machine that you use the bobbin thread for the embroideries but I would NEVER use bobbin thread in any type of real sewing other then embroidery. It just will not hold up for any length of time. It's sold purpose is to lessen the bulk of embroidery and that is all. The reason it works so well and holds so well in embroidery is that it is being sewed over several times during the process which adds the strength it needs to last. Without the extra sewing over top of each other it to would fell apart as well.
I hope this helps you to understand just how flimsy this thread is.