Interesting stuff for sure! The 5 pentatonic boxes are also actually modes - a scale form starting on each successive note.
I find it's best to think of these things in two ways - 1) as a continuation - the next "form" of a scale in the same key, and 2) as "modes".
Meaning, 1) if you are given an A major context, you can use all of the forms of A maj pentatonic up and down the neck as continuations of the original position. This is obviously great for expanding your reach on the neck. Likewise, you can use all of the modal forms or FINGERINGS as continuations of the A maj scale.
The 2nd way of thinking is more about treating each mode as a totally separate scale; as different as Major (Ionian) and Natural Minor (Aeolian). They both contain the same exact notes, but their harmonic content is very different in terms of their chords - Major= I, ii, iii, IV, V, vi, viidim and Minor=i, iidim, III, iv, v, VI, VII. This is especially important to learn with all of the diatonic modes, so that when you are faced with a minor i chord and a major IV chord for example, a la "Oye Como Va" starting from Am, you know immediately that you are dealing with Dorian; You have all of the minor pentatonic boxes in Am pentatonic, and all of the "forms" of G major, but need to know where all of your A notes are, and your basic Dorian patterns for a "home base".
It is comforting that there are only as many forms/modes as there are notes or starting points. Five notes in pentatonic, 5 forms. 7 notes in diatonic scales, 7 modal forms, 7 different chord sequences. Totally manageable. But I seriously suggest one goes case by case in order of usefulness. For example, you're not gonna find yourself in a lot of "Locrian" jams (hopefully... haha), but after Ionian and Aeolian, you should become familiar with Mixolydian (an altered major scale - maj scale with flat 7) and Dorian (altered minor - nat minor with maj 6). Then Lydian (another altered major scale with #4) and Phrygian (min with flat 2). I learned to do this by analyzing tons of songs I already knew in terms of roman numerals. They're all just major, minor chords and 7th chords. I was really surprised to find that the Police and King's X, The Stones and the Allman Brothers all used different modal progressions, but I learned a ton about using them with this context.
Extra credit - Now, if the scales are altered you get 7 MORE different modes. For example A harmonic minor is different from Nat minor because it's spelled A, B, C, D, E, F, G#. Since the G# is altered you get 7 harmonic minor modes that are different from the diatonic ones. And different chords that go with. Same goes for Melodic Minor - 7 more modes.
So you've got 7 diatonic modes, 7 melodic minor modes, and 7 harmonic minor modes. But the 5 basic pentatonic boxes are applicable for all cases!