Major INDI Library release v1.9.0 bring significant internal changes championed by @pawel-soja to modernize core INDI Library drivers and clients. New drivers for DeepSkyDad Flat Panel & Pegasus devices plus further improvements to PCM8 drivers.
Moonlite focuser doesn't move with 3.4.3 KStars MacOS
I've had a quick look and taking the strict view that any driver that sends a command but does not wait for a reply is vulnerable then it is quite a lot. All the LX200 based drivers to start with. Some of the drivers don't use a sendCommand() subroutine, the serial writes and maybe reads are embedded in each command. The Moonlite DRO driver is like that.
I spent quite a lot too much of my professional career fighting ths sort of thing on electron microscopes - just the same except that the hardware was more expensive. I had almost no say in what was implemented and one manufacturer seemed to use a different intern to do the external control for each microscope model.