 Although the 600XL/800XL were well positioned in terms of price and features, during the critical Christmas season they were available only in small numbers while the Commodore 64 was widely available.Brian Moriarty stated in "ANALOG Computing" that Atari "fail[ed] to keep up with Christmas orders for the 600 and 800XLs", reporting that as of late November 1983 the 800XL had not appeared in Massachusetts stores while 600XL "quantities are so limited that it's almost impossible to obtain".Although the 800XL would ultimately be the most popular computer sold by Atari, the company was unable to defend its market share, and the ongoing race to the bottom reduced Atari's profits.