Re: ipv4 and ipv6 Coexistence.

[Christian Huitema <[e-mail]>]

On 2/26/2020 9:28 AM, Fernando Gont wrote:
>
> On 26/2/20 14:20, Carlos M. Martinez wrote:
>> It’d be strange to find such phones for sale. Not saying that there
>> aren’t any though.
>>
>> Automatic / embedded devices are a different matter though.
>>
>> On 26 Feb 2020, at 10:03, Fernando Gont wrote:
>>
>>> Have e.g. 3G-only mobile phones been banned? Or do users *opt* not
>>> to buy such phones for a reason? (there might be an implicit message
>>> in the possible answer to this question).
>>
>
> The point is exactly that: nobody had to ban them for them to go away. 

Uh? Buying 3G phones is not that hard. See for example this offer of
"simple 3G phones for seniors":
https://www.amazon.com/Mosthink-Unlocked-Compatible-Charging-Included/dp/B07MMSFQN4.

Without going into the details of the phone market, this is just an
example of the "long tail" phenomenon that affects the evolution of
networks. Yes, when a new technology becomes popular, the most popular
devices will get updated quickly. But beware the long tail, all the
devices that still want to keep using the old technology for a variety
of reasons. Each of these devices may have a minuscule market share, but
taken in aggregate they make for a significant volume. The transition
plans to the new technology can never just ignore them.

-- Christian Huitema