[apearson]

https://whynoipv6.com/

[johnisgood]

What holds them back though? Even my shitty self-hosted website on a not-so-known VPS supports IPv6.

[apearson]

I'm assuming priorities and convincing the old guard it's something to do

[zorpner]

It provides no benefit, so even the smallest amount of added complexity or additional engineering effort required isn't worthwhile.

[johnisgood]

I did not have to put any additional engineering effort into it though.

[tredre3]

Because in your own words what you built is "a shitty self-hosted website", not a complex web of distributed services that need to talk to each-other.