More true with PF1/3.x, but the players who are used to that carry the mentality into whichever system.I think that a big part of this is because 5e removed basically all of the things with a clear cost/benefit to weigh against the cost of provoking an AoO (ranged attacks, cast a spell, object interactions, aid another, read a scroll, use a skill that takes an action, most movement, etc). Players chasrge up with their full move speed at no cost to their attack chain & stand there playing rockemsockemrobots till they need a new target.