About the password manager question - a suggestion:
If someone is already using a password manager they are awesome and doing a smart thing and should be encouraged to continue doing it rather than told that xyz password manager is 'approved' or 'disapproved' for their wallet keys (and who here is in a position to audit all the password managers forever?)
perhaps they can ask some questions of their current password manager:
is it run by a company that could disappear one day?
if so are your passwords backed up in a secure form you can open with another tool?
is there any way the service you use could read your passwords?
(...more/better questions here)
if you are not completely satisfied that your current password provider is secure (does not have access to your passwords) or that they are long term futureproof (non-proprietary storage or secure back-up format) then consider using keepass instead or as well.
Then people can make an informed choice and not just take someone's word that their password manager is 'good' or 'bad' or feel discouraged from continuing to use something that works well for them in general.
ie suggest share the criteria primarily and the opinions secondarily. great if we can confirm some other options too as examples without offering a definitive guide that might not get maintained.
getting people to use ANY password manager is sooooo hard, if they are already doing it then they are already heaps better at looking after their passwords than most of the world.
Also - a note about passwords - On a quick scan I see the guide suggests using a line from a well known song - many security experts do not recommended this practice or at least suggest adulterating the string in some way with mixed characters - assume there are giant robot monsters out there spitting star wars quotes at your secured data!