The blue/green problem only manifested itself with certain terminal 
types, which I was not regularly using.

Since you have 1.39 built, and as long as you built from today's 
snapshot, you can be the second person in the world to enjoy this:

    while true ; do printf '\f' ; top -b -n 1 | sed -e '1,6s/^/#/' ; sleep 1 ; done | console-flat-table-viewer --header-count 1

Substitute

    top -b all | sed -e '1,8s/^/#/'

on FreeBSD, or indeed

    procstat -a

Notice the |ascii| format, too.

So what the world needs now is for M. Bercot to give us a Linux+BSD 
version of |s6-ps| that uses US and RS, or |vis()| encoding.  (-:

The FreeBSD people definitely need to give us a |procstat| that uses 
|strvis()|, given that the output of |procstat| is explicitly documented 
as being a table and |vis()| encoding is actually documented for this 
type of table in FreeBSD.  (See the manual for |fstab|, for example.)