Thanks. We can definitely modify the defaults if the demand is there. It looks like these are all stock engine defaults and it's very likely hard drive space was way more limited at the time this was added.
To start with, here is some more detailed information on the settings. Personally, an extra 0 to OverallCacheSize and StaleCacheSize sounds much more reasonable.
- If MaxOverallCacheSize (in MB) is exceeded content older than 30 minutes is deleted until the cache is no longer full.
- If MaxStaleCacheSize (in MB) in exceeded content older than StaleCacheDays is deleted.
- PackageSizeSoftLimit has no effect on the cache.