@carstenbauer Can you point to a specific problem here?
One thing to note - the Modules environment is always useful in HPC clusters
https://modules.sourceforge.net
I have simple Modules file which I use to work on either 0.6.4 and 1.0.0
I think we should recognize that there will ALWAYS be a need for old/current/test versions of software packages on a shared system.
When Julia 1.1 debuts it might be marvellous. But no-one will move wholesale to ti without being confident that 1.0.0 is available. Modules makes this easy.