Do have to have rev limiter and y?

A rev limiter is not strictly mandatory for all vehicles, but it serves an essential purpose in protecting the engine from damage by preventing it from exceeding its maximum safe RPM. This feature helps to avoid over-revving, which can lead to catastrophic engine failure. In performance or racing applications, a rev limiter can also help maintain optimal power delivery and engine efficiency. Ultimately, while not required, rev limiters are beneficial for engine longevity and performance.