It is mandatory that every user should review the recovery account and update it to something that is sensible.

What too? Who am I supposed to choose as recovery accounts?

Probably if you are someone who has multiple accounts, you can have one of your alt accounts as your recovery account.

I don't have alt accounts. And you article doesn't explain how to get one. I'm not a dolphin who can just claim a new account.

There were many people who wrote articles on this topic already explaining why it is important to change your recovery account especially after the chain split.

Without a trustworthy account to choose those articles are all worthless. I did read several of them but without a trustworthy account to choose I left it at that.

Those articles need to start at a much earlier point: How to get an alt account or which accounts are trustworthy. I know most witnesses will create accounts for three hive. But how is it done?