The bottom line is - what is the fabric intended for?
I have some thin, see-through tightly woven cotton fabric that I bought for a baptismal gown - the fabric was $12.00 a yard 25 years ago!
It is difficult to put in words exactly what we mean - I think of Kona cottons as 'beefy/sturdy/coarse' - compared to many of the other 'quilting cottons' I have.
I like to put similar 'weight/weave' fabrics in one top. It probably doesn't make that much difference in the long run, but it's what I prefer to do.
A lot of the woven cotton fabrics that were used for aprons and housedresses (1940-1960) seem to be appropriate for use in quilts now.