All turnbuckles work the same way, and all are vulnerable to coming undone if not locked. It is very low operator burden to check that they're suitably locked, as compared to a potentially complex and expensive mechanism to lock them. I have often found that complex and expensive locking mechanisms (and I see a lot of them on airplanes) will wear/fail/seize, and not release when needed. You end up breaking it off, and replacing it with the more simple version that you wish you'd had from in the first place.
If, on a machine, particularly one which works outside in the dirt, a mechanism can be simple, operated with a wrench (or Visegrips), and is very low cost to repair if I let it seize, that's what I want, and I'm prepared to do daily checks to assure security, rather than suffer frustration and expense when the automatic complex thing fails.