Then it became widely known that Apple MacBooks were able to switch their built-in Wi-Fi interface to monitor mode for native wireless sniffing. The cost of these tools meant that it was difficult for the average Network Engineer to be readily equipped with such capabilities.
There was also AirMagnet Wi-Fi Analyzer that required a specific AirMagnet card and driver for packet analysis and Wi-Fi troubleshooting. An AirPcap USB interface was a pretty coveted device in the 2010's as it allowed for sniffing of 802.11n wireless frames directly in software like Wireshark on a Windows laptop. In the old days if you wanted to do wireless protocol analysis you really needed some specialised equipment.
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