when should you actually bother building your own message queue?

hey everyone, i've been thinking a lot about message queues lately, espcially in systems where throughput is absolutely critical. weve looked at kafka, rabbitmq, and pulsar, but for a very specific use case, im wondering if anyone has experience building a bespoke message queue. the idea is to have extreme control over ordering and delivery guarantees in a highly specialized scenario. is this ever a good trade-off compared to configuring existing solutions? what are the biggest pitfalls to watch out for if you go down this path?