Is MoCA reliable? Just bought a new house and wiring Ethernet into some of the rooms will be tricky, but a previous owner already did coaxial in the whole house.

Extremely reliable, but it can get expensive to have to buy a moca to Ethernet adapter at each point.

You want to stick with moca 2, and there might be some gotchas with older coax wiring, but I previously ran it for years without issue.

I think I'm running into some of those gotchas with older wiring. I've got moca adapters set up between a few rooms and have periodic dropouts on one of them, which unfortunately is the room with my wifi AP.

Traced the cables and the only splitter I can find is a moca 2 aware one, and the coax cable that would have been used for cable internet is unplugged so that's not interfering.

Nice when it works, real pain to troubleshoot when it doesn't.

2 things that solved my problems with moca was buying a moca adapter to filter the signal out from leaving/entering the house (adapter on the primary incoming coax) and then another adapter on the coax plugging into your cable modem.

This fixed some (probably modem specific) problems where internet would randomly drop in the presence of moca.

Right, I'm on FiOS so there's no cable modem, and as best I can tell the primary incoming coax line is disconnected.