With TS 3.4 it became common practice to create tuples with [a, b, c] as const. This is really convenient, however the resulting tuple is readonly. It would be awesome to add support for these readonly tuples, right now I get error readonly (something) is not assignable to any[].

this was a terrible mistake and should never have been done (by me).

This gives users a chance to log the LeafNodeSummaryAction, for example. This is especially useful in Subroutines since the app isn't walking the session so has no access.