As an example, Infinity for Reddit is likely no longer viable due to the Reddit API changes. This version of Talkback has not been updated since 2013 while this version says it is deprecated. The only viable one at the moment is this one since it has the most recent update.
F-Droid has a setting that allows you to hide apps with anti-features. One of them is ‘source code no longer available’ but another for ‘source code not updated in 2+years’ would be great for this