yes. in 2002 rob said:
* We are phasing out the IL protocol since it doesn't handle
long-distance connections well (and long-distance networks
don't handle it well, either). IL is still used by fs(4)
(in time, that too will change) but TCP has become the stan-
dard protocol for all other services.
http://tinyurl.com/o2lry
> IL works great in a local network. I would guess that the change in
> 9P to better support a stream protocol like TCP was to get better
> performance to system over the Internet. One would tcp to a cpu
> server serving 9P2000 which was IL'ing the fs.
