As mentioned by more serious folks above.
I would add that you want to get/have the 28T wood blade for your "casual" cuts. The 48T one is precisely for the cases where you need/want super-smooth cut finish, mitters, etc.
The negative rake blades /on a tracksaw/ are for aluminum only. Even for laminate/MDF/chipboard you want a positive rake blade like the original Festool ones are.
If you are not sure what blades to have as the basic set - above the factory provided 48T one - start with these two:
The 28T wood blade
- this is ideal for "casual" cuts, it still very smooth and allows for faster cutting /the saw does not need to work so hard as with the 48T blade
The 52T MDF/Laminate blade
- this is ideal for what it says on the tin - any MDF, Laminate or chipboard cuts
/note: it is actually required for those, the standard wood blades will clog and burn if used with non-wood boards, same as the laminate one one would burn with wood/