Unclear description of mariadb-backup --apply-log options

https://mariadb.com/kb/en/mariabackup-options/#-apply-log description is a copy-paste of --prepare description except of "This is only valid in innobackupex mode, which can be enabled with the --innobackupex option." phrase.

e.g. --apply-log descriptions contains "Running Mariabackup with the --prepare command", "When working with incremental backups, you need to use the --prepare command". What is the relation between --apply-log and --prepare?

in addition, description of `--apply-log-only` says "This option is only supported in MariaDB 10.1. In MariaDB 10.2 and later, this option is not needed or supported.", but both 10.1 and 10.2 are EOL already (https://mariadb.com/kb/en/mariadb-server-release-dates/). Should it be removed from this page and moved to some "obsolete versions docs"?