If I am programming the MSP$430$ in assembly, do I need to care whether or not I am using core vs$.$ emulated instructions? $($Check all that apply.$)$

Yes. The emulated instructions are fake instructions that are omitted by the assembler. They are only used for readability similar to inserting comments in your code.

No$.$ But it is interesting to note.

Yes. Since emulated instructions don't have OpCodes, some emulated instructions may not be interpreted correctly by the assembler.

Yes. You will suffer a performance penalty when using emulated instructions because you never know what core instructions the assembler is going to use to replace them.