I'm curious to hear if Nextcloud is going to be rewriting the iOS mobile client from scratch, since it's GPL and Owncloud owns the copyrights so is the only one who can relicense for Apple.
We will make sure though that this problem does not arise again since there will be a Nextcloud foundation which is in full control of the copyrights.
Disclaimer: I am the former designer of ownCloud and moved on to Nextcloud.