https://www.techpowerup.com/331486/amd-is-taking-time-with-radeon-rx-9000-to-optimize-software-and-fsr-4
 
When AMD announced its upcoming Radeon RX 9000 series of GPUs based on RDNA 4 IP, we expected the general availability to follow soon after the CES announcement. However, it turns out that AMD has scheduled its Radeon RX 9000 series availability for March, as the company is allegedly optimizing the software stack and its FidelityFX Super Resolution 4 (FSR 4) for a butter smooth user experience. In a response on X to Hardware Unboxed, AMD's David McAfee shared, "I really appreciate the excitement for RDNA 4. We are focused on ensuring we deliver a great set of products with Radeon 9000 series. We are taking a little extra time to optimize the software stack for maximum performance and enable more FSR 4 titles. We also have a wide range of partners launching Radeon 9000 series cards, and while some have started building initial inventory at retailers, you should expect many more partner cards available at launch."

AMD is taking its RDNA 4 launch more cautiously than before, as it now faces a significant problem with NVIDIA and its waste portfolio of software optimization and AI-enhanced visualization tools. The FSR 4 introduces a new machine learning (ML) based upscaling component to handle Super Resolution. This will be paired with Frame Generation and an updated Anti-Lag 2 to make up the FSR 4 feature set. Optimizing this is the number one priority, and AMD plans to get more games on FSR 4 so gamers experience out-of-the-box support.
 
I still think AMD is waiting too long for this release.