The 15-pin I/O connector for ethernet was part of the PCMCIA CardBus standard, which is why dongles could be shared between cards. After PCMCIA picked up speed, a "non-practicing entity" pulled a patent out of their portfolio for a "programmable connector". Because the PCMCIA ethernet card itself plugged into the computer and presented a different connector to the outside world, the NPE was able to sue and/or settle with something like 90% of the companies making PCMCIA ethernet cards & modems.
3COM had a cool connector on some of their cards called XJACK. It was a little tray you slid out of the card. It had a hole that your RJ-45 plug slid into and some pins. It would certainly make for thinner devices today, but the connectors broke pretty easily and you ended up with an ethernet cable sticking out at a weird angle.
Before everybody standardized on RJ-45, there was a standard called AUI which used a 15-pin D connector. Your network card would have an AUI connector and you'd buy an adapter for whatever kind of network you needed to attach to. Apple had their AAUI which was much, much smaller (about the size of 2 mini Display Ports?). But I think licensing kept that from taking off as a standard.
Well, that's actually an alternative. Instead of having a full standard RJ45 port, having a smaller laptop-friendly proprietary socket with a cheap plastic adapter to RJ45. The adapter would just be a piece of plastic and therefore this would avoid all the driver related problems and would not require manufacturers to pick up the phone to agree on a standard with their peers. That would work for me.
3COM had a cool connector on some of their cards called XJACK. It was a little tray you slid out of the card. It had a hole that your RJ-45 plug slid into and some pins. It would certainly make for thinner devices today, but the connectors broke pretty easily and you ended up with an ethernet cable sticking out at a weird angle.
Before everybody standardized on RJ-45, there was a standard called AUI which used a 15-pin D connector. Your network card would have an AUI connector and you'd buy an adapter for whatever kind of network you needed to attach to. Apple had their AAUI which was much, much smaller (about the size of 2 mini Display Ports?). But I think licensing kept that from taking off as a standard.