In general, there weren't "all those holes" because most sites didn't have that many networked computers. This was the pre-PC era. 10BASE5 could only have taps

In general, there weren't "all those holes" because most sites didn't have that many networked computers. This was the pre-PC era. 10BASE5 could only have taps every 2.5 meters. https://en.wikipedia.org/wiki/10BASE5 https://en.wikipedia.org/wiki/10BASE5