Anyway, it was a big pain to expand the pool to an every way bootable 4 way mirror (which was my objective). Looking at it from a perspective of what it would take to reproduce the machine from scratch if I had to, it was honestly a better path for me to add a desktop to a stock FreeBSD 14 install, ...

If I select MORE than 2 disks during install as a mirror, continuing is greyed out. If I reduce it to 2 disks I can continue, so um, why is that? Why does it matter? If I select 3 or 4, then just create a 3 or 4 way mirror, no? Then cycle through as many drives as are in the zroot to put a boot bloc...