Both the Stoic and Nietzschean viewpoints are valid, or rather neither is complete. On HN the Nietzschean viewpoint of "Will to Power" is usually more prevalent, entrepreneurialism and "startup hustle mentality" are all about imposing your will on the world to gain power and success. I think that this overabundance of Nietsches standpoint makes the Stoic standpoints stand out more. In contrast, some of the more Stoic forums become somewhat sedate and then a "you can change the world" type of post will contrast much more. (As an example, a lot of FIRE and permaculture forums can be very (maybe overly) Stoic)
Both viewpoints have merit but it depends on the circumstances of the person reading it which has more value for their particular situation.
Fundamental idea of a commercial culture. - Today one can see coming into existence the culture of a society of which commerce is as much the soul as personal contest was with the ancient Greeks and as war, victory and justice were for the Romans. The man engaged in commerce understands how to appraise everything without having made it, and to appraise it according to the needs of the consumer, not according to his own needs; "who and how many will consume this?" is his questions of questions. This type of appraisal he then applies instinctively and all the time: he applies it to everything, and thus also to the production of the arts and sciences, of thinkers, scholars, artists, statesmen, peoples and parties, of the entire age: in regard to everything that is made he inquires after supply and demand in order to determine the value of a thing in his own eyes. This becomes the character of an entire culture, thought through in the minutest and subtlest detail and imprinted in every will and every faculty: it is this of which you men of the coming century will be proud... – Nietzsche, Daybreak, 1880-1
This approach to early retirement largely relies on paring non-essentials from your life and recognizing how little material wealth you really need to be happy and satisfied.
It's an interesting ideology, but in its extreme form it goes hard against the grain of our culture and requires strong will to sustain. And in my experience it's hard to find a partner who buys into it.
I don't think early retirement is at odds with Stoicism, certainly not if its method includes a large amount of introspection about what you actually want and why. Read the forums first and then come back to say if they are Stoic or not. Especially the Lifestyle and Inspiration subforums, :)
In any case the request was for "more Stoic-oriented" forums, not necessarily "the most Stoic" forum.
Both viewpoints have merit but it depends on the circumstances of the person reading it which has more value for their particular situation.