IP and Ethernet were developed around the same time and also became the dominant standards around the same time. But they were mostly unrelated, so you had token ring networks running TCP/IP and Ethernet networks running IPX and all sorts of other combinations. So it's not quite as simple as that. I don't think there's ever been a time when there was a significant adoption of Ethernet without using it in combination with some L3 protocol.
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IP and Ethernet were developed around the same time and also became the dominant standards around the same time. But they were mostly unrelated, so you had token ring networks running TCP/IP and Ethernet networks running IPX and all sorts of other combinations. So it's not quite as simple as that. I don't think there's ever been a time when there was a significant adoption of Ethernet without using it in combination with some L3 protocol.