> Выбора между чем, простите? Свой zfs во фре того... без разработчиков остался.

git -C /usr/src log sys/cddl/contrib/opensolaris/uts/common/fs/zfs/

commit 7d16ecd35ca5cfd0fc3be5416f4c15936cea3b3d
Author: tsoome <tsoome@FreeBSD.org>
Date:   Mon Dec 2 11:44:39 2019 +0000
    MFC r354253, r354254, r354264, r354265
    Remove duplicate lz4 implementations
    
    Port illumos change: https://www.illumos.org/issues/11667
    
    Move lz4.c out of zfs tree to opensolaris/common/lz4, adjust it to be
    usable from kernel/stand/userland builds, so we can use just one single
    source. Add lz4.h to declare lz4_compress() and lz4_decompress().
    
    Differential Revision:  https://reviews.freebsd.org/D22037
commit 4994da9518c3fb7cdf64d9826b9a975170d9fb50
Author: avg <avg@FreeBSD.org>
Date:   Mon Dec 2 07:39:55 2019 +0000
    MFC r354436: MFV r354377: 10554 Implemented zpool sync command
    
    This addition will enable us to sync an open TXG to the main pool on
    demand.  The functionality is similar to sync(2) but 'zpool sync' will
    return when data has hit the main storage instead of potentially just
    the ZIL as is the case with the sync(2) cmd.

Хм, странно.
Да и реализация TRIM в ZoL тоже появилась после присоединения "бздунов" к разработке ZoL.
Но анонимам конечно виднее, кто там что и как "воруетЪ!"