Actually it makes complete sense. Flint was always a lower cost solution to the flame/inferno. Mainly it can only output 8bit files. .tga ect..
Flame was capped at HD resolution 8-10bit could also do 2k ( octane, onyx, tezro)
Inferno could handle 2k/4k (onyx)
Flint (standard def) could handle hd but was way too slow. (indigo, o2, octane) there was also a version re-named for the o2 called Effect option2
flint also did not have a dedicated stone array.
Flint could also be running from any decent o2 and use the built in i/o or the SDI addon board
now a days it hasnt changed much.
flint is still capped at 8-bit on linux, handles HD
flame can go up to 4k on linux (is capped at 4 cpu's)
Inferno has no limit and can use like 24+ cpu's if you got them
not cores, but full cpus
running flint with 64megs of ram sucked
-mb