I've got experience making WordPress themes and hosting WordPress instances.
I'd like to set up a WordPress multisite cluster, or set up a MediaWIki wikifarm in order to sustainably host static content in future. User account integration is currently expensive with XF2, so would probably be the longest part of making this. Our current wiki is currently broken and probably will not return.
A self-hosted instance would allow us to customise our own CSS and theme files, allowing us much more customisation with themes. We'd also be able to spawn as many instances as we needed without extra cost.
This would be a longer-term project and likely my last one before I re-retire. Thoughts on this would be appreciated!