@lkowgli I’m sorry to be blunt but you’re spreading false information.
It might seem like so but it just seems like so. Please read below about one of the problem among a few others.
TL;DR: we do need a proper ‘override’ system for simvars which is paramount to a whole category of add ons which can’t be offered on MSFS2020 because of the SDK sandbox.
Let me illustrate: from FS9 up to P3D5.x the only way to integrate our GPS products into the simulator autopilot system is to hack the code inside the simulator in order to ‘override’ the stock GPS code which is otherwise hard-coded in the autopilot system (in-process detours like approach). Similarly the only way to override what any 3rd party HSI gauge is displaying is to hack the simulator to add the capability to ‘override’ the XML, and the C SDK variables, which are otherwise read only.
This is just a glimpse of some of the limitation in the FS2020 SDK inherited from the FSX SDK. Please note the X-Plane SDK doesn’t have any such limitation because it is offering what 3rd party vendors are needing from the get go.
Update: Additional information and and how this is also affecting the CJ4