Except that part where if you don't break character to engage the skilled play elements, you get to stop playing that character because they died.
Well, that is a character of Gygaxian Skilled Play is to punish 'lack of skill' by resetting the player's character level to 1, yeah. I think SP doesn't DEPEND on it though. I mean, it should provide rewards and possibly punishments as feedback presumably, or to serve as proxy indicators/concrete goals. They could be other than ganking your PC.
Also, I'm not sure that a notion of 'must break character' to perform skilled play is NECESSARILY accurate in the first place. Certainly it COULD be true, and the implication of meta-gaming might tend to cause that in some situations. OTOH why can't I simply make up a reason my PC knows fire burns trolls? It isn't like it has to be some dark obscure secret of the game world. Other things could be trickier, my INT5 PC is supposed to figure out something clever, OK, not very realistic perhaps. OTOH what exactly are the rules of RP here? Are you saying I cannot break character at the table now and then to interject some suggestion for the Wizard player with 18INT to think about? Maybe that DOES conflict with 'actor agenda', maybe, depending on how you define it.
Also, I really hate the constant implication that lack of rules is good for RP. The rules help you play characters with mental capabilities or actual abilities different from your own. 'Creatives' that insist that rules and structure inhibit creativity are generally either just wrong or lying for the cred.
I wasn't trying to make that argument. Nor is it one that I generally subscribe to. OTOH there are examples of such rules, like alignment (which interestingly has nothing to do with SP and is pretty close to the only 'role playing rule' in classic D&D).
Anyway, it isn't like I'm an apologist for OSR. I would vastly rather play Dungeon World than old school OD&D mostly. I enjoy the greater ease of story generation and I like world-building as opposed to being told what is written down by the GM exclusively. That isn't really what this thread is about, or so I was recently told!
If I was to compare OD&D and DW, then I would think overall actors or story tellers will be happier in the later, for sure. Power gamers, maybe its a wash, though 'power' is a very different concept in each game. Explorers, probably depends on your preferences, exploring a pregenerated world vs exploring a jointly constructed one as it is being defined.