Not worked on it about 18 months now. From patches F to X10, the memory layout hardly changed (in fact, not at all since the BF1 was introduced), just shifted further up the memory range. I made my app backwards compatible with all these patches with little difficultly. Patch Y changed a lot of things, and by that point I had a job, so almost none of the free time I had before.
I don't see why nobody else has made something like this before. The initial memory ranges for the known values were kindly given to me by someone who had done the hard work, and I just found everything else by poking around in exactly the same area. They really are all just grouped together. People just must not know what they are looking for, or be bad at testing for subtle changes.
I'd still to like to update, finish and release the app, at some point. But it's lowest priority in my list of projects atm. VHPA, my site, and the setup guide come first, and to get all that done is a huge amount of work (given the little time I have left after going to work, being social, doing house chores, keeping my car & bike in a serviceable condition, taking it easy now and then, and sleeping).
Of course, motivation is another issue. Seeing as I hardly play LFS, or any other racing sim or even any other games atm, there's little interest in making a game mod. While on the other hand, a conversation I've been having with Tristan about his car has led me to 'discover' disc springs (aka belleville stack), so the past few days, at lunchtimes and evenings, I've made a stack generator/calculator which I've since added into my working copy of VHPA. I find it easier to go with the flow when something interests me, than to force myself to keep chogging through a big, tedious task. I'm supposed to be doing this out of interest and enjoyment after all, it's not like I get paid for it.