Hi Commanders,
The xsimulator guys recently resubmitted a request for motion data from FD. AFAIK there has been nothing resolved yet. The current xsimulator plugin is supported but is not working since the latest ED update. If the signs are that this update will remain in place for a while (i.e. more than a few weeks) then there may be an updated plugin.
I'll also point out that as a motion rig user, they are not as expensive to build as you think. I did mine for £300 and it was a gamechanger for me. As good as VR - which I also use.
Well, I have the instinct to over engineer EVERYTHING.
For instance I have probably built my HOTAS stands out of sturdier materials than my house.
This is mostly a side effect of the fact that I have no clue when it comes to even basic DIY or any type of engineering.
Besides as you mention, FD has done something to break it, and that's my main reason for not going headlong into a build, it was an unsupported third party feature, and those can come and go in the blink of a patch.
And as a one time third party tool builder myself, I can't expect someone to maintain the support for one either. People have lives and kids to feed.
If FD however adds this feed then becomes an entirely different matter, and would probably re-consider.
And personally I would much rather have this than space legs, even if I never got a motion rig.