The number of times I've forgotten to plug in my external cache drive when launching After Effects is astronomical.
Because the app automatically reassigns the caches to internal storage (first screenshot below) it's annoying and fiddly and time consuming to then attach the cache drive and go to the settings and re-assign the caches to the external drive.
This could be avoided if After Effects simply presented a choice dialogue box when the expected cache is absent, something like the second screenshot below, which I've made in Automator to help me remember!
Thanks,
Tim