How do NVIDIA’s new GeForce RTX 5090 and 5080, released with fanfare regarding their new features and capabilities, perform in real world AI applications?

How do NVIDIA’s new GeForce RTX 5090 and 5080, released with fanfare regarding their new features and capabilities, perform in real world AI applications?
How does the choice of Operating System affect image generation performance in Stable Diffusion?
How does performance compare across a variety of consumer-grade GPUs in regard to SDXL LoRA training?
How does performance compare across a variety of professional-grade GPUs in regard to SDXL LoRA training?
AI and Machine Learning have a large number of technical terms that can be confusing to those new to this space. This glossary features easy to understand definitions for a variety of terms related to AI and machine learning.