Well. . . it's not just "Limited Editions" which are out of print, but other regular items. . . .
I guess it's a relative matter of concern depending on your tastes and how long you've been collecting. If your main interest is in the hardbop sessions and the big names. . . you're probably okay now and in the future; Concord will repackage this stuff if you don't have it now.
If you're interested in traditional jazz and more obscure items and have been collecting some decade or two. . . you're probably okay and have gotten the bulk of what you would be interested in. If you have the same interest and are a new collector, you may be hard-pressed to find these titles in the future, they're hard to find now. . . . I'm sorry to see that situation, but can certainly understand why I'm seeing it.