They ditched the alert slider? When? I'm on a OnePlus 6, and have been considering installing LineageOS on it to give it a few more years of life. The alert slider is one of the reasons why I don't want to give it up just yet.
No, they still have the alert slider. It wasn't on the OnePlus 10, but they brought it back on the 11 and it looks like it will be included on the upcoming 12.
Weird that they left it off the OnePlus 10 and brought it back for the next generation. I'm glad they did, though. I still think I'll stick with my OnePlus 6 for a bit, if I can keep it running.
The slider was probably the feature that I liked least about my OnePlus phones, and it was actually a factor in me deciding to not get a OnePlus phone again. Unlike the iPhone switch, which had an action that was perpendicular to the direction that my phone was moving when putting it into my pocket, the OnePlus phone's slider was parallel to that movement. So the slider would change positions every time my phone would go into my pocket. I like my phone on vibrate 99.9% of the time, so I always needed it in the middle position, which was the hardest one to get it into. I always found myself wishing I could disable that feature, but I never found a way to.