All fourths tuning

[1] In contrast, the standard tuning has one irregularity—a major third between the third and second strings—while having perfect fourths between the other successive strings.

The regularity of chord-patterns reduces the number of finger positions that need to be memorized.

[1] Jazz musician Stanley Jordan plays guitar in all-fourths tuning; he has stated that all-fourths tuning "simplifies the fingerboard, making it logical".

All-fourths tuning is traditionally used for the bass guitar;[5] it is also used for the bajo sexto.

[8] Allan Holdsworth stated that if he were to learn the guitar again he would tune it in all-fourths.

The note layouts on the fretboard of a guitar tuned in perfect 4ths, with arrows that show where the same note continues on a higher-pitched string. All adjacent strings have the same interval and repeat at the 5th fret, unlike standard guitar tuning which has an inconsistency between the 2nd and 3rd strings.
Open chords for beginners.
These chord shapes can be moved across the fretboard, unlike the chord shapes of standard tuning.
More movable chord-shapes.