Incremental investments in a DAC are completely dependent on your associated components and your anticipated future. So if I had your current DAC in my system (my average component cost is $20K), then upgrading it would provide huge differences each time until I got into roughly the range of my other components. Performance goes up with cost in general.
With the components you have today a Yggdrasil or Denfrips are likely to be valuable upgrades. Now consider you future system. I don’t think I saw info on your streamer. But assuming you are using a PC or Mac… I would upgrade the streamer after the DAC… that should give you a big improvement.
Lets say your current system cost $7K, then if you carefully upgraded all your components one level up, say to the total cost of $14… it would sound a lot better…. If you upgraded to $21K… or $50K, etc… each step would provide a big jump in overall performance. Is this what you see long term? Typically most folks get there by upgrading one component at a time.
If so, then each upgrade should be done with your eye on the next level… matching all the components on that level. This would suggest spending more than just to reach parity with the rest of your equipment.