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.
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.
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.
A builder who has lubed switches and tuned stabilizers and chosen a keycap profile and still cannot place why their next board feels different from their last one is usually meeting the mount style. The plate's relationship to the case is the half of the typing feel that nobody discusses on a sound test.
The label appears on keyboards at every price point, from $90 prebuilts to $400 group-buy customs, but two boards with identical spec-sheet language can sound nothing alike. Here is what the term actually tells you, and what it doesn't.