Use up arrow to recall previous commands from command history, TAB key to automatically complete words in the command you are typing, ENTER key to execute the command, Control-C to interrupt currently running command and return to prompt and ? to display built-in help.
I presume there is a reasonable technical explanation for the gratuitous interface change?
I think (but could be wrong) this is already the case since 7.1
What’s new in 7.1 (2021-Dec-01 16:07):
MAJOR CHANGES
!) updated Linux Kernel based on version 5.6.3;
!) completely new NTP client and server implementation;
!) completely new User Manager implementation;
!) merged individual packages, only bundle and a few extra packages remain;
!) > new Command Line Interface (CLI) style (RouterOS v6 commands are still supported);
!) support for Let’s Encrypt certificate generation;
!) support for REST API;
!) support for UEFI boot mode on x86;
But you are 100% correct with your remark as far as documentation is concerned.
There are couple of places on that page were correction is needed.
The table at then end with possible keys to be used, does display F1 as help.
I can’t find back the discussion which was taking place when it first was switched but certainly it must have had something to do with aligning to UI standards (most applications link F1 to help).
EDIT: release post for 7.1
It was discussed there.