First off, Corvettes do not use the 10R. They use an 8 Speed dual clutch transaxle. Second off, forum and social media posts are entirely subjective and anecdotal. Unless you're a technician with first hand experience, you're just spreading second hand complaints. On the internet, people will complain about anything and everything. When millions of a complex mechanical/hydraulic/electronic component are produced, there is always going to be a certain percentage (typically less than 0.1%) of failures. That doesn't mean it's a bad design or that every one is defective. That's a ridiculous assertion to make.
You keep saying "chevy", but the company is GM. And GM is not "abandoning" the 10R (10L in their applications). The 10L is being used in the 2021+ Camaro, Tahoe, Suburban, Yukon, Yukon XL, Silverado, Escalade, and Sierra. On the Ford side 10R is being used in all F-150s now as well as 2019+ Ranger, 2020+ Explorer & Aviator, Expedition, Navigator, and Bronco.