Can OnlyFans or porn mess with future jobs?
It can. It can also never come up at all.
That answer is frustrating because people usually want certainty. Will a future employer find it? Will they care? Will a completely different industry ten years from now treat it differently? Nobody can honestly know all of that in advance.
So I would ask a different question: if somebody finds it later, can I live with having made it?
That is a much more useful decision test because it does not depend on predicting somebody else's future reaction.
Recognition obviously affects the odds. A visible face, real name and direct links from your personal social accounts make the material easier to connect to you. A stage name, separate accounts and faceless content make that connection harder. Harder is not impossible, but it changes the exposure.
The type of work matters too. Art nude photography, fetish modelling, a faceless creator account, explicit porn and live camming are not the same thing socially. A future employer may react differently to each, or may not care at all. There is no single category called "adult content" that everybody interprets in the same way.
I find it more useful to imagine a boring realistic scenario than a catastrophe. A colleague stumbles across an old picture. Somebody you went to school with recognises you. A future partner learns your stage name. Can you say, "Yeah, I did that," without your life falling apart internally?
If yes, that tells you something. If the idea makes you feel sick even when nothing dramatic happens, that tells you something too.
Doing one production instead of posting for years reduces the amount of material attached to you, but the one production can still be public for a long time. That is why I take stage names, face visibility and publication seriously before a shoot. The useful privacy decision happens before the material exists.
This is not an argument for or against doing the work. It is an argument against letting reassurance from strangers make a permanent decision for you.
It can also help to search yourself occasionally the way a stranger would. Legal name, stage name, old usernames, image search, combinations of your name with the platform you use. That does not predict what every employer will find, but it gives you a more realistic picture of how connected your identities already are.
The career question also changes over time. Somebody studying medicine, teaching, law, entertainment, hospitality or running her own business may face very different cultures around public sexual material. That is why I dislike blanket reassurance just as much as blanket scare stories. The useful part is understanding your own exposure and deciding whether the possible future trade-off is acceptable to you.