In regards to being able to set a preference on which sub forums you see and/or being able to "hide" a thread, get more granular message controls, etc...
I don't maintain the code or features any longer. I only jump in when there is something that I think;
1 - Will make a big benefit to the community and don't want to wait for others to decide and act due to urgency (

). Example would be the mandatory but dismissable and scheduled news alerts as a way to route traffic for a flood of contentious conversations around a school shooting.
Or
2 - There is something I really want and don't want to ask for... and can ask for forgiveness(

). Example would be reactions (so I could dumb posts) or thread node filtering on newest posts page.
If you would like to request/suggest new features, I would post in the Site Related Forum and allow others to weight in. That allows
@ChrisMWilliams a way to see and consider such posts.