Why do the lofts go from 4 degrees of separation in the short irons to 3.5 degrees of separation in the long irons? Does this even matter?

What is a proper wedge gapping by degrees after the 44 degree PW? 48, 54,  58? Is the 6 degree gap too big between the 48 and 54?

Britt Lindsey Answered question 6 days ago