When you go from IPv4 to IPv6 you are gaining more features and will have more security
The problem here is not how hard it is to switch.
But if it will be worth to switch. That is what network effect is about.
Yes, you can switch over to laserdisc.
But how many people did switch from vhs to laserdisc?
On the other hand, if another currency becomes popular (let's say dogecoin), regardless of how inferior it is technically, if it becomes extremely popular commercially, it will become dominant.
There are two aspects that fuels the network effect: a new conformity and a cognitive inertia.
This is interesting. Let me contribute to this line of thought as I may know IP&all a little bit:
- most service providers today can offer you IPv6 service alongside your IPv4 service and these can work along side fine.
- you won't get more security with IPv6, possibly even less than IPv4 as for IPv6 there is no standard for NAT/PAT, which gives you 99% of security in IPv4 due to fact it hides your devices from the Internet.
- there are some new features that you do get from IPv6 but nothing spectacular, well autoIP is really nice.
- biggest change is that w. V6 you have 128 bit addresses which means every device can have Internet wide IP address, but...
- ... apart from your Win/Lin/Mac PC almost none of your other devices supports V6.
- most big companies have IPv6 servers on web, but not all.
So you see network effect or not, switching to V6 solves no immediate pain and is therefore unlikely to happen.
In contrast VHS solved a big problem that LaserDisc had as you could record/copy tapes and consumers liked that.
So to the point: Bitcoin has great features, however one thing that is cannot do with it is taking it to the supermarket and instantly pay for groceries. (which is what you can do with most credit/debit cards) Don't look at network effect features of Bitcoin vs. AltCoins. Bitcoin ultimately competes with other payment systems which have enormous network effect, so to bread through Bitcoin must have a KillerApp.
I also don't think positioning Bitcoin "above" consumer level will do any good. Bitcoin must be good for consumer level transactions and only then will it have a chance to compete.