There are no loose (or even long attached) threads involved in the stitching I do on a quilt top and ravelling fabric edges are generally not a problem with good quality fabric and accurate cutting. What few loose threads there may be are not worth trimming in my opinion. I'm convinced trimming just makes the edges ravel more anyway.

Once sandwiched and quilted, no one sees what's on the inside of my quilts so what possible difference does it make if I don't waste time and weaken seams by trimming the seam allowances unnecessarily? Loose threads on the outside are a whole different story. :)

Trim as I go, and made the mistake of forgetting to run over it with a lint remover at the end b4 sandwiching. Ended up with BLACK threads in the WHITE section of my log cabin. What a PITA it was to get those few out after-the-fact. My (circa 1985) machine doesn't auto-clip thread.

Cutting Threads
 

I always buy machines with the auto thread cutter. Use it for all piecing. What a time saver!
Diana

I have a thread cutter on my Juki and I don't have any threads to cut. I LOVE that thread cutter.

I try to cut as I go, but miss a few, I get those when I am sewing the blocks and rows together. I keep a little nippers on my ironing board.

I cut as I go because I hate sitting here snipping threads, and if I do it as I go, I don't feel like I have spent all that much time at it

I cut as I go, something I also learned in Junior High home ec class.

Some do, some don't. Do what you like. I hate to see loose threads on the back but they don't really show. I'm just compulsive!

I would say I cut as I go, but then where do all the loolse threads come from on the back when I'm ready to sandwich? I think, no matter not diligent I think I am being, the more a top is handled, the more the little boogers unravel and make a mess back there.

I am almost fanatical about cutting as I go. I cannot stand to leave the threads on. Compulsive? OK!