I learned about bothTCP/IP and ARM in university, and my take-away was that ARM was specifically for phone calls, not data. Maybe that perception held it back.

I learned about bothTCP/IP and ARM in university, and my take-away was that ARM was specifically for phone calls, not data. Maybe that perception held it back. Or maybe TCP/IP was simply too entrenched. Even IPv6 has been unable to replace IPv4.