Funny you used this example :)
I'm a month and a half deep into using it to make a traffic simulator with a bespoke physics engine that has complete drivetrain, suspension, and tire kernels. Think rally sim with an arcadey super off road presentation. It also has a full (also bespoke) webtransport stack that has held up beyond my wildest dreams. The simulation itself is capable of >500k cars. That was all complete about 2 weeks ago, the remainer of the work is integrating and optimizing the (you guessed it, also bespoke) pure synthesis sound engines for drivetrain/engine/tire/collision noise, and making pixi performant enough to actually display it all.
My biggest regret is actually accepting its choice of pixi, if I would have just trusted what I knew and done my own renderer too it'd already be finished! In the meantime I'm having fun boiling down the nonlinear continuous-ish models into fitted surrogate polynomials and regime-specific closed forms. Currently using cloud credits I was given to test the library I need to accelerate this work on CDNA3/4 cards. It's so nice to make someone else's room hot for a change
I've really enjoyed the ~3 month speedrun from "he has psychosis" to "the model did everything", yet somehow the number of people having this kind of success continues to match up with where I'd rank a given dev. There just aren't that many talented people out there and an even smaller subset of them are aiming high enough with LLMs, if at all. It's a truly awesome time to not have/need a job
E: Most of my frustration is directed at OAI, they keep fucking up the cache and usage calculations. They got a grand out of me, I'm excited to see what Deepseek does for me with the same.