The data don't get stale, so scientists will be able to make inferences based on that data for as long as they'd like. A lot of it will never stop being useful.

If a much better telescope comes along or an especially dynamic phenomenon is discovered there might be a temptation to take more pictures of something that has already been captured, but otherwise, why would you? This data is expensive and will probably remain so for quite some time, for the obvious reasons.

We are still analyzing data from 70 years ago.

https://carnegiescience.edu/news/old-plates-new-data-mysteri...