But with the invention of writing and particularly printing, this becomes less of a problem. Technologies may well go out of use, but so long as they are well documented they can always be recreated with relatively little effort. Especially once you have advanced maker bots, any previously developed technology is available at pretty much the click of a button.
Yes, of course, provided the civilization is prudent enough to store
both the required information and the required raw materials. As far
as I know, many real world governments have some kind of secure
storage of cultural and technological data, including those which cur-
rently seem useless, and also store all kinds of potentially useful raw
materials, encouraged to do so by the risk of a major nuclear war
and the scenario to have to rebuild an entire civilization afterwards.
I think we would also be prudent enough to give a distant colony a
complete copy of such data, especially since data are easy to trans-
port and store, and the necessary raw materials could probably be
found on the other planet, or be replaced by similar materials.
However, I would not find it difficult to imagine a colonization pro-
ject by humans or aliens which fails to include seemingly useless in-
formations, and which could therefore be forced into a technologi-
cal decline and a trial and error reinvention of "outdated" technolo-