The plate is the cheapest variable in the build and the one builders argue about hardest. Most of the heat is misdirected — but a usable fraction of it is real, and the difference is worth pinning down.
The housing line on a switch spec sheet is the second-most-important thing about a switch, after the type, and most buyers skim past it. Material decides how the switch rings, how the stem rails feel under a finger, and how much grace it gives a bad lube job. A 'PC top, nylon bottom' tag is doing more work than its three words suggest.
Few stock linears earn the word 'creamy' on first press. The Oil King does, and the reason is not a secret stem material or a proprietary lube — it is a careful pairing of housing resins and a factory tune that other linears under thirty cents tend to skip.