People generally arrive at this question sideways. A designer wants to be judged on work rather than a job title. A researcher wants to talk to forty people who understand a narrow subfield. A contractor wants to be findable by the three companies who buy what they sell. None of those is a complaint about any particular product. They are descriptions of jobs a broad network was never specifically designed for.
That distinction matters, because it changes what a good answer looks like. If the underlying problem is "I want depth in a narrow field," then the useful move is usually addition, not replacement. If the problem is "I dislike how a feed makes me feel," replacement may genuinely help. The two get discussed as though they were the same question, and they are not.
Five reasons that come up repeatedly
- Signal-to-noise in a general feedBroad networks optimise for breadth. A specialist reading a general feed encounters a lot of material aimed at someone else.
- Evidence of work, not description of workSome fields are judged on artefacts — code, drawings, writing, case files. A text profile is a weak container for those.
- Unsolicited outreach volumeDiscoverability cuts both ways. Being easy to find means being easy to contact, including by people with nothing relevant to say.
- Cost of paid tiersFree tiers cover a lot. When someone needs a paid feature regularly, the annual figure becomes a real line item worth comparing.
- Communities that simply live elsewhereEntire professions coordinate on forums, chat servers, mailing lists, or in person. Their absence from a network is not a gap in that network's quality.
The part that usually goes unsaid
Reach and relevance are different goods, and improving one often costs the other.
A smaller, sharper community will nearly always produce better conversation per hour spent. It will also, nearly always, be seen by fewer people. Anyone choosing between them is choosing which of those two they need this year — not choosing a better or worse product in the abstract.
This is why lists that rank platforms from best to worst tend to disappoint. The ranking silently assumes a goal. Change the goal and the order changes with it.
How to read anything on this subject, including this
Notice whether the writer has told you what job they are optimising for. Notice whether specific claims about features, pricing, or size are dated and sourced. Notice who benefits if you click. Those three checks will filter out most of what is not worth your time, and they apply to this page as much as to any other.