I think the best solution is to just keep both, I have all the source code for all my projects since maybe 2008. But I also keep a lot of screenshot, if I want

I think the best solution is to just keep both, I have all the source code for all my projects since maybe 2008. But I also keep a lot of screenshot, if I want to refer to an old project I go to those screenshots (or even better, videos) in 99.9% of the cases.