Oops. I guess I wasn’t clear enough, sorry about that 
I am using it as my musical sketchbook for demos. I love it a lot and didn’t want to move to a DAW.
I am creating a clicktrack in it, record guitar 1, then guitar 2 and vocal is 3, so 4 tracks total. That’s it.
I mix it then and export in .WAV for later purposes.
Between the final export I have recorded, added other tracks, adjusted volumes (mixed) and saved the project a lot.
I know jpegs, mp3, etc. lose quality with every save and even though I am pretty sure AUDACITY wouldn’t do me that dirty xD
but I would rather ask to make sure ;p
So to clarify, I recorded a few tracks, adjusted volumes, panned left/right and saved it like x80 times
to my project as aup3
FILE>Save Project
None of the tracks lost any data, right?
I wasn’t adding any effects or anything that could get baked in.
One more question:
Tracks > Mix > [Mix and Render to New Track]
Is it lossless (I know it is NOT an audio file ;p)? Does it only glue tracks together without any data loss in the process?
Some people export their tracks to .WAV first and then continue to work on them (limiters, normalization, compressor, etc.)
but I just used:
Tracks > Mix > [Mix and Render to New Track] and continued working on that newly created track by adding some things like compression, limiter, etc.