Discussion on answer by RGW1976: What is wrong with the word "performant"?

If everyone avoids using a word until it becomes a word, will it ever become a word? This 'word' is very common in the field of computer science and fills a whole that is of course not supplied by an existing word because the exact concept did not exist until recently. Isn't that how new words are invented--we encounter new concepts and make new labels? It's either that or via slang.