Honestly, I don't find AC and AMS2 all that different in feel and optimal driving technique. IMHO, the bigger differences come down to setup choices and tire model. There are cars that are objectively broken in AMS2 (CART Ovals anyone), but I find the same general techniques are quick in both. The same cannot be said about iRacing physics. (Which GM is not the only 4k+ rated driver, but mine is in RX because it's the only thing I actually enjoy driving there.) That said, I 100% understand people who haven't tried the game in a while being hesitant to jump back in. Many cars are completely unrecognizable from their previous versions: both C3's, M1 ProCar, F-Retro Gen 2, etc. Many fully open diff cars still behave in weird ways IMHO, often lighting up a tire at strange moments. The Copa Classics are a good example. Some of the recent mods have highlighted that many of the elements people criticize about AMS2 are not specifically inherent to the Madness engine or AMS2 physics model. Try the 458 Italia mod compared to the AC version. There's some discrepancies in the tires, but I can toss them both around in a similar manner. The IndyCar mod doesn't feel at all like any other formula car in AMS2, but it doesn't feel bad. Stiffening the front suspension and locking the diff more on the C3 street car immediately made it feel more similar to Mustangs in AC. The Ferrari 250 GTO mod felt like other AC mods with a more modern tire. Basically, I think simracers are blaming the engine for everything, while it may be more subjective choices from Reiza that they don't like. GM is entitled to have his opinion, as are we. AC's more simplistic tire model meant it was easy to dial into a range of believability. AMS2, ACC, and iRacing have all shown that a physical tire model has benefits, but will be more difficult to refine.