But then a lot of software still only supports IPv4, e.g. Dropbox or Resilio Sync. In the latter case that gives me some serious headaches, it has the tendency

But then a lot of software still only supports IPv4, e.g. Dropbox or Resilio Sync. In the latter case that gives me some serious headaches, it has the tendency to open a lot of connections at once. I think my ISPs DS-Lite uses some quota, because when I have sync open on more than a certain number of devices, IPv4 connections start getting dropped and IPv4 is basically unusable for 5-10 minutes. I am pretty sure it's related to DS-Lite, because it doesn't happen to devices that are connected to a VPN. It would help me a lot if all (mostly proprietary) software vendors would finally start supporting IPv6.