Just so everything's out in public, I've been (very) hard at work at my utils library github.com/browndragon/util .
I highly recommend it; it has:
Topics: scriptable object UnityEvent implementations which let you fully disconnect pub from sub (plus extra tracing & debugging)
CLONES. Trace prefab asset<-->instance through to runtime; easy pooling-by-prefab and returning.
Isometric tile utilities like Billboard (works with tilemaps)
Infrastructure Utilities like a Coroutines (get Update ticks in a scriptable object), StaticAsset (automagically get Camera.main-like behavior for arbitrary scriptable objects), and various Invokers (wire up collision or mouse behavior through the inspector for testing)
QOL Fluent utilities like T OrThrow(T), bool IsEmpty(T), etc; Chain for implementing HashCode and IComparable, tern for implementing behavior trees
Math & additional datatype & inspector support like MinMax and all the collections (serializable map, etc); also PID controller and easing and generic math and generic conversion and...
Maybe even more stuff I've forgotten.
Anyway, please give it a go and LMK what you think.