> > > 67MB MFM disks running 4.3BSD UNIX are gone for more than a decade now.
> >
> > please read whats stated at www.netbsd.org just at centre.
>
> You honestly don't expect that options like QUOTA or ktrace or bpf
> would be cost-free, do you? That's why they are kernel _options_,
> and thus can be omitted if you don't need them. However, expect
> appropriate performance hit if you DO include them.
>
> We take care to keep bloat at minimum. NetBSD has been quite
> good in this, and you can balance the features vs. performance
> to acceptable levels even for slower archs to much extent.
>
> It's ridiculous arguing about how an optional feature might slow
> down a system. If you don't need it, don't include it in your kernel
yes - if it will be really optional.

to make ACL really optional probably new filesystem must be made as FFS
has no place for such data in inodes.