When NOT To Learn Scales...
Trying to save you from wasting your time working on the wrong stuff.
When I used to take admissions assessment at the Guitar Institute I often saw people come in that could play many scales in 5 positions but couldn't use any of them, and it used to really bug me. There really is no point learning the Super-Locrian mode if you don't know what it's for or when you will use it. You will know when it's time to learn a new scale
1. If you don't know why you should learn a particular scale, then don't!
2. If you can't use one pattern of the scale, don't learn more, it won't help.
Gotta learn to use what you got before you start trying to learn more things, it'll only lead to confusion and frustration!