MoCA adapters are much more expensive compared to typical Ethernet adapters in general but work in a pinch. I've moved frequently and have lived in older houses so I'm now armed with two different powerline Ethernet adapters, a pair of bonded MoCA 2.0 adapters (one is already included if you have a STB from a cable provider technically but the Ethernet port on it may not be a passthrough or bridge connection), and a Ubiquiti based setup. While the best option outside of direct CAT5+ cabling is the MoCA adapter setup, I'm disappointed that in most older homes with pretty awful wiring I can still only get 600 Mbps maximum. I know it's the house's cabling because in my previous house I used the same adapters and got a clear 850 Mbps for a slightly longer cable distance. Sometimes a signal booster [1] helps but tends to boost the wrong frequencies if you buy the cheaper ones that were meant for older, analog broadcast in a home.

[1] https://www.amazon.com/Splitter-Signal-Booster-Amplifier-Int...

Everything old is new again:

https://en.wikipedia.org/wiki/10BASE5

But no, I hadn't heard of it. (I realize the impedance and signaling is obviously different.)