Also - something I thought I knew, but later found out I was wrong about, the number number of queues in csv import does NOT equal the number of threads you can run concurrently. E.g. one suitecloud plus license gives you 5 queues but only 2 threads, meaning you can queue up 5 files at once in different queues, but it'll only ever run 2 of those concurrently (or one file at ~2x speed if you're multi-threading).