After X attempts to log in, it bans the IP address.
It will scan your wordpress files and alert you if any of them have changed in suspicious ways (hacked).
It can disable the xml-rpc endpoint which is rarely used and is a big vector for hacking.
… and a lot more but those are the main ones for me.
Ehh, it’s ok in the case of JetBrains - if your subscription lapses your license converts to a ‘perpetual fallback license’ so can just continue using the version you installed when the subscription was originally purchased.
I’m using a 4 year old version of PhpStorm with no issues and no subscription. My PyCharm sub ended 6 months ago and I’m staying on the 2023 version of PyCharm because the latest version comes with lots of AI which makes my CPU fans scream continuously.