[surajrmal]

Writing oo style code in c is extremely common. At least where I work we often pass around structs of function pointers to accomplish roughly the same thing a vtable would give you and name methods such as foo_verb for methods that operate on struct foo.

An algebraic data type is just a c union with an auto generated flag and moving some type validation to compile time. Unions used in this manner are quite common in C. I do think the increased ergonomics and safety exist, but only when paired with other features like pattern matching. Selling algebraic data types alone as the major novel feature improvement is a bit misleading and dismissive of existing c features.

I do agree that additional compile safety in rust makes it far easier to confidently refactor without introducing bugs. Accomplishing the same in C requires a lot of unit tests which add maintenance overhead. Python is a more extreme example of that playing out. That all said, I don't think it's necessarily relevant to writing a performant scheduler.

Rust has many strengths and I endorse using it over C any day. That said, the way it's marketed feels misleading and gives experiences c developers bad vibes.