The true competitive threat to the Unix vendors wasn't each other, it was Microsoft. And "for a long time" was actually a fairly short time. Linux began to app

The true competitive threat to the Unix vendors wasn't each other, it was Microsoft. And "for a long time" was actually a fairly short time. Linux began to approach feature-comparability fast, and ran on PCs, not $10,000 workstations (that were getting beat power-wise by PCs).