Many forum users use the Tor browser to avoid IP detection. Some even use VPN to keep their location private.
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Doesn't using both tools really have the same goal? The difference is that Tor is free and it's a browser like any other with the difference that it provides the best level of privacy you can get at the moment. On the other hand, any VPN, regardless of whether it is paid or free, is a far worse option considering that it stores user data and shares it at the request of the authorities.
Of course, people use VPNs a lot more because that way their surfing speed is much higher than is the case with Tor, which is still much more sophisticated in terms of the privacy it provides, but because of that it is also a little more demanding to use.
But Tor cannot provide absolute anonymity, because if you have done something very bad, there are security services that can find your real location, regardless of how you tried to hide it.
You are right about them but some people prefer to use a VPN instead of TOR because there is some inconvenience for them when using TOR. The Tor browser doesn't store user login details so a user needs to log in every time he restarts the browser. Many avoid using TOR for this reason but there can be other issue but I don't use TOR for that. Also TOR seems slow which you already stated in your comments.
To be honest the level of hacking is happening in the industry these days I am also thinking about using TOR no matter how inconvenience it will be for me. Online security is more important than having too much comfort using the browser.