edit: I've been running dual-stack with Windows, macOS, iOS & Linux for at least a decade now - I think it's closer to 20 years than 10! I've never seen it be like the parent post for my personal use, but I have seen it broken like that in places I've worked with incorrectly configured routers/firewalls.
edit 2: this isn't a good idea for v4 either, but it's less broken than v6!
I’m sure I do. But that’s sort of the point. I only use standard commercial hardware with the default config.
If that doesn’t work out of the box, what chance does someone who doesn't have my decades of networking experience have in fixing it?
Granted I’m probably more sensitive than most because I know what network issues look like. Most people probably just think some things are slow sometimes.
My ultimate point though is that this is probably a barrier to adoption.
1. people who just use the router their ISP provides
2. people who go and buy off the shelf consumer routers/wifi - eg Netgear, Linksys, TP-Link
3. the kinds of people who run home labs and use small/medium business targeted routers/wifi like pfSense, VyOS, Unifi, Mikrotik, or even things like Juniper SRXes etc.
The first group will get a 'blessed' and hopefully well tested IPv6 configuration when their ISP rolls it out, and I'd expect minimal problems there. Certainly haven't noticed anything big in the UK with some of our biggest ISPs rolling out v6.
The third group will inevitably have teething troubles, but v6 works okay on those kinds of platforms once you know how to configure it, from my experience.
The second group is where a lot of the pain will sit, imo. I've found consumer routers have really bad IPv6 implementations (things like broken prefix delegation, broken firewalling that can't be changed, IPv6 negotiation not working over PPPoE, weird RA settings, etc). The firmware on these kinds of devices is usually not great, and things like hardware acceleration engines in router CPUs are also frequently missing acceleration paths for v6 for things they already accelerate for v4. It will get fixed eventually, but it's going to be a pain point for a lot of years to come.
I'm in that 40%. I use IPv6 on my phone whenever it's not in my house.
