[quote=@Rithy]
<Snipped quote by Eisenhorn>

On the bright side, non-psykers can focus on the purely physical plane during combat, whereas a psyker might feel as if someone is constantly screaming right into their ear through a giant loudspeaker when they are fighting a particularly powerful daemon :D
[/quote]

Downside being if a psyker goes critical, they are left to clean up the aftermath. Sometimes with very subpar gear for hte cleanup xD