oh, right, that too… too bad, because UI/UX wise it has been pretty slick at some point

Be careful of rocketchat : beside some exotic technology choices (meteor), they seem to be in a dynamic of re-closing previously opensource parts of it. Something like that already occured with their ldap implementation (it needed some love, but sadly they give them closed-source love…)

you might want to add borg, restic and - more recently - plakar to that list

Why not something like NAS4Free or OpenMediaVault, then? You don’t have to chose between DIY and paid-for, there is a middle-ground