DAX Debugger

This would be very helpful. I tend to have to break the DAX expression up into separate parts when debugging, but that sometimes changes the context or creates an intermediate value that I can't directly see (ex tables). It would be nice to be able to step through a DAX expression and see the results.

This would be incredibly helpful.

Certainly required as debugging a DAX is a painstaking adventure consuming high cost of resources.

Definitely needed!! Because we are blind when things do not work as expected...

What would be useful in Power BI Desktop would be to enable "Debug mode" and then click any data value point on a visual, or grid cell and invoke a graphical debug that shows what tables are involved and what filtering is being applied (step by step)

this should be bread and butter of dax developer. i wonder why not many people vote for this feature. maybe dax is not as popular as i would love to see

This is must required to debug DAX developer. Do needful

Also there is no way to check the performance of the report unless we use a third party tool like DAX studio. I think DAX debugger would help it.

Right now, figuring out where the issues are in my DAX code is much more difficult than it should be. I would really like to be able to step through the process, so I can see where it's going sideways, like I can in Excel VB. Right now it's a lot of teasing apart and guesswork, which is so slow and annoying.

This is crucial. As soon as your model grows and especially when you have to deal with inactive relationships (so you use USERELATIONSHIP or CROSSFILTER) you basically have to "guesswork" what's happening under the hood. Because if you don't use them you can add a table and slicers and see how your filter works, but once you switch contexts and use those, it's impossible...