[kazinator]

If all strings use the same interval, you have less variety in fingering; everything is the same everywhere.

The M3 interval between the G and B string is useful; you can allocate fingerings between those two strings to play certain things that don't work for a pair of strings that are a P4 apart.

[elsherbini]

Totally agree, I think regular tunings are cool and easier for learning in a lot of ways, but the ergonomics of standard tuning or other non-regular tunings make somethings easy that are really beautiful. I think making whatever you consider to be desirable on your instrument also be idiomatic and easy to do is good.