It was reverse-engineering SMB and making SAMBA, which is now in every single device in your home and office, and it's gloriously free as in speech *and* free as in beer:
In the years since, a thicket of laws we colloquially call "IP" has grown up around services and products, and people have literally forgotten that there is an alternative to wheedling people to endure the pain of leaving a proprietary system for a free one.
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