Al, I'm not diss them or their efforts, just I wanted to know who they were. 
This is the first I had heard of them,  I am, however, dissing the web site which I could not figure out how to use. 

On Mon, Jun 8, 2020 at 10:51 AM Al Kossow <aek@bitsavers.org> wrote:
On 6/8/20 6:10 AM, Clem Cole wrote:
> I'm seeding this URL to TUHS as one would expect them to be interested in the work from Warren and friends. FWIW: I tried to browse their
> archives and was not impressed (I couldn't find anything).
>
> https://www.softwareheritage.org/

Don't diss them too badly. They are good folks,
especially with how they are dealing with archiving and deduping almost-identical
source trees.

They stop by CHM every few years.