It appears that someone took a racing yacht hull, which the project stalled from some reason and finished it off as a cruising boat capable of sustained motoring at hull speed. I would definitely call it a sailboat; it has a higher sail area to displacement ratio of any Island Packet (for example) ever made and calling it a motor-sailor is inaccurate.
There have been a number of similar projects starting with former ocean racers converted to long range cruisers. The build quality is generally very good and if the hull did not experience delamination during their strenuous career, they will serve just fine under the lower loads of a smaller sail plan. Set up for living on the hook and being self-sufficient makes sense, what doesn't make sense is using them for coastal cruising where a long LOA is expensive and limiting for dockage, storage relative to a pretty constrained living space. The sail budget for such a boat is on par with a re-power and the air and water draft for such an animal is a major constraint.
Frankly, while I know it was a new build, the subject boat looks like it suffered a partial dismasting, lost the tip of the rig so they just modified the spar, rigging, re-stepped the mast and ordered smaller sails.