Similarity. Getting consistent results over a series of images for a cohesive style is easy with SOOC JPEGs; for Fujifilm cameras, use the same Film Simulation Recipe for all the shots in a given series. RAW files require additional discipline to achieve consistent results than those who shoot JPEGs.
Soul. On Fujifilm cameras, using Film Simulation Recipes can be considered more authentic because they often replicate the look and feel of traditional film photography. The camera's built-in simulation modes, such as Classic Chrome, Classic Negative, and Acros (to name a few), mimic the colors, contrast, and tones of analog film, based on Fujifilm's vast experience and heritage in analog emulsions—they infuse a bit of film soul into their digital images. Fine-tuning film simulations, such as adjusting color saturation or grain strength, allows the user to tailor the idea to their personal preferences and creative vision. Additionally, there is a growing sentiment among photography consumers (not photographers, but those who view pictures) that "Photoshop" is terrible and picture manipulation equals people manipulation; however, unedited images don't carry that stigma and can come across as more authentic.
Simulation. Each camera brand has its unique colors and rendering. Fujifilm calls their JPEG profiles film simulations, which are heavily influenced by their experience and history with film. Fine-tuning those film simulations to mimic specific looks (often based on classic film stocks) produces Film Simulation Recipes, which deliver analog-like images straight-out-of-camera that don't require additional post-processing. Film Simulation Recipes' popularity is a significant reason why more photographers are forgoing RAW editing and shooting SOOC JPEGs instead.