Midjourney is way more versatile than SD. If you start getting some fine tuned models on civitai, trained to do well some specific tasks, you can get comparable quality but I haven't seen a single model which is able to replace Midjourney.
Llama is no different, it has ok performance on generic queries but still far away from GPT3.5: if you start fine-tuning you can get good perf on specific tasks.
Sure, its very easy to get good results fast, but the tuning that avoids "uglier" images is the same that removes a lot of versatility compared to SD
Also controlnet is a killer feature
They’re very similar offerings if you’re willing to put in the work on SD.
Sure, Midjourney is a centralized commercial service with a clear statement that you (as a paid user) own the images you create. While that doesn’t resolve all potential copyright issues (as there are still at least theoretical issues with the underlying dataset), if you doing something commercial with it like, say, a webcomic from which you derive income, its a lot simpler than dealing with the SD ecosystem where the plethora of models also have different stated usage restrictions, different suppliers (many of which are hobbyists) to keep track of, and more potential avenues of indirect copyright risk, as well. For some webcomics, even the base CreativeML Open RAIL-M license itself might be problematic.
This isn’t a technical or quality advantage, but its definitely an advantage that would very often tip the balance between two tools if both are minimally adequate to your task.