In practice, it's rarely an issue in C# because it offers excellent concurrent collections out of box, together with channels, tasks and other more specialized

In practice, it's rarely an issue in C# because it offers excellent concurrent collections out of box, together with channels, tasks and other more specialized primitives. Worst case someone just writes a lock(thing) { ... } and calls it a day. Perhaps not great but not the end of the world either. I did have to hand-roll something that partially replicates Rust's RWLock<T> recently, but the resulting semantics turned out to be decent, even if not providing the exact same level of assurance.