<pedant>Scout rank has been there a while; I started in 1981 and it was still fairly new then.
</pedant> But yeah, that still means that for most of the history of BSA, it did not exist. I think so much of it overlaps with Arrow of Light that it’s redundant; they might as well confer the Scout rank onto the Arrow of Light recipient right then and there.
I believe that, at the same time they introduced Scout, the uniforms changed from olive-colored shirts to khaki.
My son has lost interest in it but the main new thing I noticed was that they did away with skill awards (the metal ones that fit over the belt). When he was in Cub Scouts, it was all right on the cusp of changing, but much of his Bear handbook (mainly, the illustrations) was just how I remembered from the late 1970s.
IIRC, way back when, “Lion” was the same rank that’s now called “Webelos.” IMO nothing disrupted pack night than having Lion-age (and, in some cases, Tiger-age) Cubs running amok among 5th graders who, as the “big boys,” were expected to keep still.
Part of me wants to see my son stick with Scouts and finish what he started. (I didn’t finish, myself, though I made it farther, and put more effort into it, than he did.) The other part of me says if he’s not interested, he’s not interested – and the Jamboree episode just makes it easier for me to accept that.
FWIW I’m unaware of any public school (at least, in my area) that sponsors any Boy or Cub Scout groups. I thought it had to do with BSA’s stance on religion and that taxpayer-funded organizations could, or would, no longer sponsor troops/packs. OTOH the local high school rents (or was renting) its cafeteria to a church on Sundays, so maybe that’s not the reason. Local schools also (to my knowledge) do not sponsor Girl Scouts or Camp Fire, and those have no religious qualification. My kids’ elementary school would let all of those groups publicize on back-to-school night, but the school’s involvement started and ended with that.
(various edits for clarity)