In this case, I want to take a set of values from one sheet where they
are related to a Term and paste into a separate sheet, but paste them
all into a single cell.

I could use the function =concatenate(Sheet1!b15, Sheet1!b16, Sheet1!
b17,Sheet1!b18,Sheet1!b19). And I'd need to add a delimiter in there
making it =concatenate(Sheet1!b15,", ",Sheet1!b16,", ",Sheet1!b17,",
",Sheet1!b18,", ",Sheet1!b19). This is fairly straightforward, but I
have a few of these right now and they range from 3 terms to 17 (in
today's batch).

Is there an easier way to do this? Wouldn't in be nice if the function
CONCATENATE allowed you to specify a range or list and then a
delimiter?

But it doesn't work that way - is there an easier way (than the manual
way described above) that I haven't thought of?