In the 1990's the PC's didn't come with network cards there was a mad dash for extremely expensive at the time Madge Token Ring network cards. I think there was something magical about them and it was a monopoly at the time as I believe that Mr. Madge had something to do with figuring out Ethernet.
That said resetting a token ring network involved a manual effort.
Here is what the connector looked like. Note this connector is bigger than my pinkie.
And the IBM 8228 multistation access unit. It was a manual reset should there have been an issue.
The Madge 4/16 Mbits/s Token Ring ISA NIC
The whole beginning pieces of using Ethernet also was a bit kludgy in that the vendors of the PC's network cards / built in stuff didn't always see eye to eye with the vendors of the network hubs. The network cards had coaxial and RJ-45 ports on it. Auto Negotiating a network speed was very iffy and somewhat magical. The PC vendors blamed the network switch vendors and the network switch vendors blamed the PC vendors.
Most recently it was relating to the standards of POE and Gb speeds stuff. The original Cisco POE switches I used were a Cisco propietary standard as there was not POE standard in the beginning.
Thinking that the OPII NIC is a weak link today cuz yesteryear mostly folks didn't have a bunch of stuff on their network or even no network. I mean those old PC's only had dial up modem access to AOL way back.