Provided this on wikitech-l, too:

Looks like the user pageviews for wap.wikipedia.org and mobile.wikipedia.org subdomains are approximately 0.02% of the size of pageviews for m.wikipedia.org subdomains based on a recent one day check.

hive> select count(*) from
wmf.webrequest where
year = 2015 and month = 7 and day = 14
and access_method = 'mobile web'
and (uri_host like '%.wap.wikipedia.org' OR uri_host like '%.mobile.wikipedia.org')
and is_pageview = true and agent_type = 'user';

35,543

hive> select count(*) from
wmf.webrequest where
year = 2015 and month = 7 and day = 14
and access_method = 'mobile web'
and uri_host like '%.m.wikipedia.org'
and is_pageview = true and agent_type = 'user';

202,024,891

On Thu, Jul 16, 2015 at 5:36 AM, Adam Baso <abaso@wikimedia.org> wrote:
There's a ticket for removing mobile.wikipedia.org and wap.wikipedia.org domains/subdomains, which are legacy domain names superseded by m.wikipedia.org and its subdomains.

https://phabricator.wikimedia.org/T104942

The rationale for the removal of these legacy domain names is to help support HSTS preloading in browsers with the existing TLS SAN cert.

After review of the ticket, can anyone think of a compelling reason to keep those old domain names?

I opened a separate thread about this on wikitech-l under a different subject about this as well.

-Adam