Back when the Conversion Cache was first introduced, we had a cool feature to limit it to a certain size. This was useful because you could set that size to be 2-3 times the size of your handheld, and it would just manage itself. Helping you to quickly transfer the most popular files over, while still allowing you to use the High Quality Profile MP3 setting and automatically convert higher bitrate files.
Since the Cache was converted over to the new Stacking functionality, we lost this ability. I'd really like it back. I use a number of smartlists to automatically pull "radio-station-like" sets of files out of my master library for our iPods. The Cache works well for this, but I will eventually "cache" nearly all of my files on the system. I don't need that much cached!
I can certainly appreciate that some people would prefer to just cache everything eventually, and always have 2 copies of every file. Especially with video files, I just don't have the drive space for that. I'd rather have a manageable-sized cache, whether the cache is stacked with the files or in a manually-defined cache location, of 2-3 times the size of my handheld devices.
Any chance the size limit option could make a triumphant return?