Lanyard Adjusters.

I recently acquired an ART Positioner 2 from a good friend. I was previously using a Trango Cinch on 10 mm Yale Beeline Blue, but that was red flagged at the Kentucky Arborist Association TCC. There was an issue with the rating on the Cinch only being compliant with rope that had dynamic qualities (40% elongation is what it ended up being defined as). I stopped using the Cinch immediately. So then after the comp I braved muscling around with hitch cord and a micro pulley for a while, until I just made that sweet deal I mentioned in the first sentence.
With so many options available, changing gear around can become quite a dirty habit. Not to mention expensive. But there is nothing like a great combination of gear that allows us to be that much smoother in our actions and movements. Some tools affect us more than others, and I think a lanyard adjuster may be one of those tools. Too much drag and it becomes painful, too slippery and it becomes dangerous, too big and it becomes restricting. I mean, think about how often you lanyard in. I rest my case.
Hitch cord seems like the traditional, versatile solution to lanyard adjustment. Add a micro-pulley and a carabiner and you have a durable, long lasting adjuster. The problem with hitch cord is two fold though in my opinion. 1) Sap destroys the flow. 2) You can't suck your hips in really close to a stem without the hitch knocking against the anchor or wanting to wrap around the backside. Aside from those two issues, of course normal wear and tear will always be ticking away.
Mechanicals are many. You have your basic cammed setups like the Petzl Micograb and its relatives like the Gibbs, and then the more modern adjusters the ART Positioner and the Petzl Grillon and the likes. That list can go on and on, and all of these devices have their own specific ratings and requirements. In my opinion, as far as tending rope, there is no comparison with mechanicals to the option of hitch cord. Another benefit is in the exposure to sap. Yes, mechanicals still have their threshold in sappy scenarios like pine and spruce where I am, but I find that even if sap accumulates on a mechanical device, it's much easier to disassemble and clean up verses removing it from cordage, which is basically impossible.
Also, I think another deal breaker is the type of rope you use for your actual lanyard. I was on the that Trango Cinch kick for a while because I was running the super small 10mm line, and that ran best through the Cinch for me. Well, when I axed that from my toolbox, my next available lanyard was a 24-strand double braid that I combined with 8mm Yale Veritas. Too grabby for my liking, the hitch cord would really lock into place after a while of being loaded, and then it would become really hard to tend. That's when I did the deal for the ART Positioner 2, and it's running super nice on that same 24-strand rope. Same rope, different devices, totally different performance. Imagine then, the potential combinations.
I think I took it for granted not really studying the ratings and requirements of the lanyard adjusters, namely mechanicals. Some of these devices are really only rated for very specific ropes in order to be compatible and safe. Everything needs to jive in these systems, from the smoothness right down to the size and structure of the individual pieces that make up the whole. Pay attention to these things and re-evaluate your setup. Maybe you can make it safer and more efficient all in one move.