It's not unnecessary, it's harder (no stable kernel ABI, and servers won't touch DKMS with a ten foot pole).
On the other hand you might say that lack of stable kernel ABI is what begot ebpf, and that Microsoft is paying for the legacy of allowing whatever (from random drivers to font rendering) to run in kernel mode.
On the other hand you might say that lack of stable kernel ABI is what begot ebpf, and that Microsoft is paying for the legacy of allowing whatever (from random drivers to font rendering) to run in kernel mode.