Not the latest prototype that flew... it was one ugly fat bird.
Unless a J-10D is just incremental upgrades to J-10C or just a future avionics refresher, seems like a waste of resources to invest any further into the J-10 platform. By 2035 fully autonomous aircraft should be taking over the role of short range / lightweight fighters.
LOL. I do prefer the slimmer second prototype (B) more. However, the latest (C) is still MUCH nicer looking than the F-35. Don't you agree that even if you prefer a size B, upgrading to a fuller upper-bodied C size has its benefits too? I am thinking longer range of course.
More seriously, a semi-stealth KFX-like plane has an export market and allows China to maintain a larger peacetime ORBAT and industrial/talent base at low costs so real money can be spent on more high-end toys. Most countries cannot afford twin-engined planes and why give away market to Korea or Turkey? That is not a Chinese/Yiwu thing to do. I hope they are aiming for a half-generation more advanced KF-21. I do think having a J-10D prototype/first flight in 2022 is too soon though (2024 LRIP, 2026 IOC, and 2028 first brigade/regiment?).
I whole-heartedly agree and cannot see much usefulness of a short-legged light fighter for major/regional powers and I am sure China has been pitting multiple AI engines in simulated air combats 24/7 to hone their skills (like Amazon's DeepRacer API). Ditto for testing a StarLink-like LEO constellation MESH network for datalinking such swarms.