This was what I wanted to know at the top of the thread. It is clear to me what the changes are now.
foreach … done is comme ci comme ça. Shortens the code but I usually do complex stuff, including repeat $!-1 l[$<] ... endl done and commands and selections between the repeat and local and endl and done.
Yes, indeed sometimes the usual repeat..done construct will be more adapted.
It’s just a proposal for another construct that will simplify maybe 80% of the commands in stdlib 
I understand. Just concerned whether adding more commands that do essential the same thing in a limited way is a good thing or not…
Yes, that is debatable.
Anyway, note that repeat was already something we could do with a for:
foo :
i=0
for i<$!
... do something here ...
i+=1
done
is equivalent to
foo :
repeat $!
.. do something here ..
done
Yes, I have wondered about that too. 
I tried just this example. It loops forever not foreach!
As I said, the feature is not implemented yet.
I’ve started writing some code for it, but it’s only a start.