I largely agree with this article's assessment. As a machine the Jupiter Ace was simply too little, too late. Had it been more powerful, with more RAM and better graphics, it could have given the Speccy a run for its money, but rather it was already obsolete, being positioned as a competitor for the ZX81 when the ZX81 was already very dated and where it had little in the way of a cost advantage over the far superior Speccy. Running BASIC rather than Forth would not have saved the Jupiter Ace, and rather if the Jupiter Ace had had specs that compared with those of the Speccy it could have given it a run for its money.