Aren't we making userspace/kernel space communication a lot more efficient with io-uring, though? Likewise, eBPF allows userspace programs to perform some work

Aren't we making userspace/kernel space communication a lot more efficient with io-uring, though? Likewise, eBPF allows userspace programs to perform some work inside kernel space to reduce syscalls. I wonder if io-uring won't be a starting point for a "microkernelization" of Linux. It seems really effective as a message-passing interface.