I’ve been wondering if there is any online service which allows one to compile a document using different versions of TeX Live (2018, 2017, 2016, 2015, …) and compare the result. I’m imagining something like browsershots (web development) or, to a lesser extent, ideone (general programming) for TeX.
I often find myself wishing that something like this existed when comparing document output between different versions of TeX Live or finding out when a bug in a certain package was introduced/fixed. However, having so many different full installations of TeX Live side by side is not something that is easy to set up or maintain. So, is there another solution that allows comparing different versions of TeX Live quickly?