Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
PluginsArea: what it touches
Internal ChangesKind: in v2.1.238,
Internal ChangesSection of the release
What
Storage gained a pluginAssetCache area keyed by content hash, along with a mapper that recognises the older on-disk plugins/asset-cache directory and routes it there.
Details
It participates in the same enumeration as the paste, state and plan areas.
Evidence
pluginAssetCache
Strings lifted out of the shipped bundle, so the claim above can be checked against them.