Warning suggesting that innodb_page_size is experimental may be inaccurate

If a user sets something like the following in their configuration file:

innodb_page_size=64k

Then they will see a warning like the following in their error log:

InnoDB: Warning: innodb_page_size has been changed from default value 16384 to 65536d. (###EXPERIMENTAL### operation)

But the documentation seems to imply that this option is no longer experimental, since Percona's experimental version was replaced with the version from MySQL 5.6.

https://mariadb.com/kb/en/mariadb/xtradbinnodb-server-system-variables/#innodb_page_size

Is this warning inaccurate? If so, the "experimental" reference should probably be removed.