Brian Jones stays in Stones 1969 forward or Mick Taylor stays in Stones 1974 forward

I figured out what you meant, but it took a while. You might want to ask a mod to change the title so people can follow it. I checked your other posts, and they often have confusing spacing, like:

But, on topic, I dearly wish Brian had stayed a Stone, BUT that would’ve been impossible without him getting serious professional help. In terms of drug use and mental issues.

If so, the Rolling Stones would’ve had more diverse instrumentation and experimentation.