You'll greatly appreciate all the articulation joints when doing a flatter hollow form and you have a nearly perpendicular to the bed cut. I much prefer the articulated hollowersI might add, I generally prefer the least amount of connections or joints in any of my woodturning tools in order to reduce the risk of vibration. I prefer a single bar over one that has been joined multiple times such as this articulated hollower. However, this particular hollower is one that I may wish to own. The joints are extremely tight and solid. No slop whatsoever. So, who made it, is the question.
When you mount a tool, you set it up with mild to modest down pressure on the tool rest, so vibration from the joints is not an issue. And tool movement secure and steady. (I can let go of the tool a few mm from the wood and expect it to stay put).I generally prefer the least amount of connections or joints in any of my woodturning tools in order to reduce the risk of vibration.