hopefully at some point a more easy to use, non java, "cloud-native" distributed log with decent client apis shows up. (if anyone wants to help building it, please ping me. i am 10 years into building startups and companies with architectures ontop of kafka and pulsar)
Finally, and perhaps most importantly, it is substantially faster than Kafka.
Disclosure: I work there.
Can't think of a more well behaved java app. Heap usage generally low, never seen GC issues and fast as needed