Op 15 is my very first OnePlus phone, so I don't really have strong feelings about not having a slider. I just bought it last week and imo this feature is underrated. It's useful for people like me who like to screen capture text and analyze it. For example, I used to screen capture a lot of articles I found amusing, but it took up space and, more often than not, got buried by photos so I wasn't able to go back and revisit them. With Mind Space, I can store these articles and easily revisit them when I'm just on my phone. Another way I use it is for translation. Suppose I'm reading the review section of a product or just checking the comments on a video, and there are comments that can't be translated in-app. I use Mind Space to screen capture, then use Gemini by long pressing the power button and asking it to translate the paragraph for me. Another good use for it is summarizing. Really, it's essential, especially for news articles that shows up in Facebook. Hit Mind Space to summarize, then I can ask Gemini if the article is legit or fake, then ask it more follow-up questions. Even now that my text is long, I can hit Mind Space and get a summary in bullet points in 3 seconds. It's an AMAZING feature, especially if you're a student who's preparing for a PowerPoint presentation. Save an article or your thoughts you would want to present, use Mind Space and now you have bullet point summary. Yeah, I thought the Plus Key button would also be a good shortcut for a quick flashlight, and that's especially useful at night for a quick trip to the washroom. But I'd rather take 2 seconds to open up the torch using the quick settings panel, because in there, the torch actually has four levels of brightness, which is neat in my opinion. So yeah I'm actually one of the few who likes this feature Mind Space. I mean, I thought the feature was something more spectacular, but still it's useful.