Comment by nnq

If you'll need XP-era software in the future, you'll just run it inside a Win XP VM. Same for DOS software. Same for any software who will outlive its initial host (open-source or not) and will not be very simple to tweak and recompile (even if you could tweak and recompile it, you might choose to just run a damn VM anyway out of pure laziness or for cost/time savings...)