People don’t want CNAME at the apex. They want a pointer to a server for a 
service at the apex.
CNAME provided a pointer to a server when the prefix was www. 

This can be done a number of ways.

1) Prefix  + name in rdata.
2) Service specific type + name in rdata. 
3) Generic type + service and name in rdata. 

This is DNS choices from the IAB. 

ANAME is a extremely complicated version of 2 for HTTP which may be morphed 
into 1 with a well known service name for other services but will always have 
the risk of being misinterpreted. 

There are much simpler ways to achieve 2 than ANAME for HTTP.
 
Mark
-- 
Mark Andrews

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