Get Super8mm Kodachrome
while it lasts. It's been discontinued. The replacement is a 60 speed Ektachrome, which is supposed to be pretty good, although no Kodachrome, with its archival qualities.
Kodachrome is still available as Cinechrome 40 for REGULAR 8mm cameras, and it is still available in 16mm and for 35mm film cameras.
The problem is that if you have a more basic camera like my Technicolor pictured here, or any of the old Kodak Super8mm, they were setup with a simple switch that either set it for the Kodachrome 40asa or the Ektachrome high speed 160asa (also not available anymore).
Since the Ekta 60 is more sensitive, you will have overexposed film, as with many Super8mm cameras you have no control on exposure. Higher end cameras, like my Chinon Pacific, some Swiss cameras, etc, did let you manually set film exposure.
There are some with strong stomachs that have been opening up their cameras and attempting to reset the exposure adjustment to recalibrate the meter.
My hope is that someone like Fuji will provide a 40asa film as an alternative, but it might not be a financially sound move with such little demand. The upside is that if you have an adjustable camera, there are other films, even negative films if you can believe that, for Super8mm.
If you have an old Super8mm camera in the closet, now is the time to get it out, buy up the old film and enjoy some film making.
To get an idea of the power of Kodachrome, here is something I shot down the street after a rain. Bear in mind that this was projected slightly out of focus, grabbed off the screen with only a single chip digital video camera, and recorded. You can still see the Kodachrome quality, especially in the sky. The original film will look like that in 50 years.
My dad has some photos and slides from 1962 that look absolutely perfect.
