Are you still friends with any of your childhood friends?

i've puzzled this question ' why i don't carry friends over from one stage of life to the next?'
part of it is just choices - i was the only one from my grade school to go to my 7th grade, i was the only one from that school to go to my high school, the only one from HS to go to my college
( i did have a friend go from my college to NY and we've been live long friends)

i've always had this strange attachment to the Kung Fu tv show - in particular to the closing credits of Caine walking across the sand towards? the metaphor of his footsteps in the sand making an impression but eventually fading away seemed resonant
for whatever reason (until having kids) this seemed like the metaphor for my life