What is the reason to ignore zfs_arc_max when it's set equal to zfs_arc_min explisetly

[matveevandrey]

Before ZFS 2.0 setting zfs_arc_min = zfs_arc_max did hard limit usage of ARC with corresponding values

# Don't let ZFS use less than 96GB and more than 96GB
options zfs zfs_arc_min=103079215104
options zfs zfs_arc_max=103079215104

But now setting these 2 values equal gives the result as folllowing:

root@pve-node2:~# arc_summary   |  grep  size
ARC size (current):                                    97.3 %  122.5 GiB
        Target size (adaptive):                       100.0 %  125.9 GiB
        Min size (hard limit):                         76.2 %   96.0 GiB
        Max size (high water):                            1:1  125.9 GiB

Upper limit is ignored and set to half of RAM memory.

Well, setting "zfs_arc_min" to 103079215103 does solve the issue but what is the reason behind?
Specially if it breaks compatibility (old behavior) with no good reason