I guess that’s what i mean. It seems to be limiting because it’s based on simple open cords and relating pentatonic to those chords, while knowing the modes opens up the chords to all the variations.
Well, not sure about all this. Again: It might be very, very different for each person and very different for different styles of playing.
Just a little bit from my personal "scale history": At first I was obviously shown the pentatonic scale. But as I wanted more, I found out about what often is refered to as the 5 "main positions" (let's not argue about this for now), only to expand them to 7 positions later on - which, at least on paper, is making sense. I mean, in a typical 7-note scale/key, there's 7 notes you can start your pattern on, and if you're always using the same finger to start with, you automatically end up with 7 positions. Just that you don't - which I realized after having a look into "A Modern Method For Guitar" by William Leavitt (back then kinda like the guru of modern guitar teaching), who basically want's you to play all keys in one position or one key in all positions. Which makes up for 12 positions (fwiw, it's a great academic practice and defenitely food for your brain as well, but IMO not exactly useful in actual daily use)
And then later on there's been 3NPS scales. Which are not "in position" but always moving between 2 positions. So, yet another thing (or 0.5 thing) to consider.
Whatever, so much about my history.
It's just that when I later on analysed the way in which I was playing most often, it would in fact boil down to 5 main positions, just that I'd never "fully" use any position. Like really never. But the center of my playing could still always be rooted back to one of those 5 positions. And if someone really wanted, these 5 positions could then be rooted back to the idea behind the CAGED system. So there, almost full circle.
However, when it comes to scales regardless of how I started and how I got there, what taught me the most was "comfort zone" playing, which I think many players will ultimately end up with, regardless of whatever initial approaches they went for.
One kinda method to get there for me has been to explore string pairs in octaves. An example, here's a G major scale pattern on the A5 and E6 strings, lowest note being an F#:
A5 ---------2-3-5
E6 --2-3-5-------
Apart from the missing note E, it's almost a full G major scale. Now, this very note pattern repeats on the D and G strings, just 2 frets above. And you could now use the A string to perform a position shift, covering the missing E (still on the A string) and then proceed with the same pattern on the D and G strings. Then, the pattern repeats on the B and E1 strings, this time 3 frets above. But you could still use the same way to shift positions and then continue.
With this very scale pattern, you're already covering a whole some more fretboard estate than with in-position or 3NPS patterns. And it's basically 3 times the same fingering pattern. Win-win.
No, this doesn't even remotely qualify as an ultimate approach, some scalar patterns really aren't nicely falling into place, so the position shifts would have to be modified and what not - but it's a great way of organising things IMO - well, it's a great "additional" way of organizing things.
Another thing I was doing a lot for a while was playing the same note sequence (just anything between, say, 3 and 5 notes) in as many variations as I could think of. Once you're doing that it will become sort of apparent which way to play these notes is the most comfortable for you, the best sounding one, the one allowing for the coolest bends and what not.
And again: There's many ways to skin this cat. And it makes a whole lot of sense to at least briefly look at some of them.
Fwiw, when it comes to all things scale-noodling, I should possibly add that playing quick runs has worn of for me a long time ago already. So instead of focusing on bursts of speed, I prefer it much more to raise my "baseline speed" - as in being able to play pretty much the things I want to play at decent pace. Defenitely kept me away from becoming a fast gun, but I can live with that.