I think when people talk about RCV (in the context of single-winner elections), they're almost always talking about the same thing as IRV.

"Ranked voting" is the more general term.

> Ranked voting is any election voting system in which voters use a ranked (or preferential) ballot to rank choices in a sequence on the ordinal scale: 1st, 2nd, 3rd, etc. There are multiple ways in which the rankings can be counted to determine which candidate (or candidates) is (or are) elected (and different methods may choose different winners from the same set of ballots). The other major branch of voting systems is cardinal voting, where candidates are independently rated, rather than ranked.[1]

> The similar term "Ranked Choice Voting" (RCV) is used by the US organization FairVote to refer to the use of ranked ballots with specific counting methods: either instant-runoff voting for single-winner elections or single transferable vote for multi-winner elections. In some locations, the term "preferential voting" is used to refer to this combination of ballot type and counting method, while in other locations this term has various more-specialized meanings.

https://en.wikipedia.org/wiki/Ranked_voting

I share your frustration with FairVote and CGP Grey (and recently an episode of Patriot Act) painting an unrealistically rosy picture of RCV/IRV as the solution to our voting problems.

There are some other systems that aren't ranked voting at all that I think would be significantly better than IRV, such as approval voting, range voting, and STAR voting (which is basically range voting with an immediate runoff between the top two).

For some reason, FairVote persists in claiming that in approval voting (which is like traditional first-past-the-post voting except that you can vote for more than one candidate), you somehow maximize your voting influence by voting for only one candidate. They call this bullet voting. I don't know what possible reason one could have for believing this.

This manifests in their comparison chart:

https://www.fairvote.org/alternatives

They show "resistance to strategic voting" as "high" under RCV and "low" under approval voting. This is somewhat subjective, but I think they've got it backwards. Under approval voting, strategic voting and honest voting are basically the same: you vote for as many of the candidates as you can tolerate, and maybe if there's a candidate you really don't want to win you vote for everyone but them. Under RCV, it's only safe to put you first choice first if they are either clearly in the lead or so far behind they have no hope of winning. If the outcome is in doubt, it's possible to cause your first place candidate to lose by putting them first. (That's a weird problem for any voting system to have.)

For this reason, I don't trust FairVote; I don't think they're presenting their preferred voting system or the alternatives honestly. They're more of an advocacy/PR organization that's pushing their chosen solution out of a sense of inertia or something.

The Center for Election Science is a smaller, less-well funded group that advocates for approval voting (and similar methods) that I donate to from time to time. They had a successful campaign to convert Fargo ND to approval voting back in 2018.