My C&L44 (looks like a MT) came to me with a small mast and boom. There are eyes in the deck corresponding to the points you would expect to find stays attached. No stays, no sail.
The first time I used the boom for lifting anything, I had a sabot, built to win dinghy races, so right at the minimum total weight under the sailing rule 52# including all the gear. I was lifting the empty hull, but it was too much for the mast step, an aluminum casting that broke with the dramatic effect you can imagine.
My opinion of the OEM setup, you can also imagine.
As an ex sailor, (currently only Lasers in an Old Guys club) I calculated the minimum sail area needed for any noticeable effect for get home propulsion. Need less to say not possible. For steadying, a small sail did work on the fishing Troller I cut my teeth on, so I wasn't quite ready to discount that, but the look would have been off, and being a hard chine, SD hull, my boat doesn't roll so much that I would ever consider mounting sail. For laying at anchor without hunting around the bay, the sail is too far forward to have any noticeable effect.
I replaced the OEM stuff with better and have used mine for lifting the Laser, even when it was suffering from a significant amount of water getting into the hull and weighing lots more than its 150# dry weight.
Others use their mast and boom only to get the anchor light up a ways.