If this is a serious question, this is why:
Confluence users are enterprise companies, and getting a self-hosted server up and running is too much pain to be bothered to deal with.
This is a process problem. The steps to get one would be something like:
- try and find the “provision a server” option in the corporate service portal (there probably isn’t one)
- ask someone if they know how to provision one. Get a link to a separate system where you can make the request
- you need to associate the instance with a cost centre, or maybe you literally need a credit card number, don’t forget to attach written manager approval
- update the project’s budget to include the unexpected cost of this internal service. Hopefully there’s actually some margin to afford it.
- wait a day or two for the request to go through
- get the instance details, RDP in and try and set everything up. Realise you need to make a separate request for admin rights to install non-base software if you don’t want to use IIS and MSSQL server
- wait a day for admin rights. Don’t forget to add written manager approval to the request or else it will be denied
- realise you need to make a separate DNS request to get a friendly url for the team to access it. Also, how are you going to secure access to just your team members? Need to integrate with the corporate AD
- …about a dozen more steps
Compare all of that with:
- Go to the corporate confluence instance
- click “Create”, add your team members with edit rights.
- done
Confluence itself may not be a great experience to use, but it’s solving the problem of getting to the point of having a wiki setup in the first place.