but its 2.5Gb. Each ethernet port is only 1Gb. You'd need have what, three pairs, all simultaneously trying to transfer their nearly their full 1Gb to saturate 2.5Gb.
If you have 5 or less, it shouldn't be an issue.
But yes, it would not necessarily work great in something in like an apartment.
Ethernet (at least oveR twisted pairs) is a full duplex transmission medium, so two devices should be able to more than saturate the MOCA broadcast network.
Additionally, >1Gbps is starting to become common on consumer hardware.
Again, it is probably not going to be a concern for most home networks, and MOCA should still be better than mesh networks or powerline ethernet.
I suppose in theory, yes. I'm not sure how often, in my home network, I would have full duplex 1Gbps transmission, unless I've accidently caused a loopback.
If you have 5 or less, it shouldn't be an issue.
But yes, it would not necessarily work great in something in like an apartment.