I also use them and love them. However, theres sometimes an advantage with a standard crescent when access is limited and you have to flip the wrench. The pliers wrench is best in one direction.
Usually its back and forth between bahco 9073 rp and pliers wrench and a little channellock wide mouth adjustables for variety.
Knipex plier wrench has its use, I find it fiddly to set up on a bolt (i think they make an auto-adjusting kind which might be better) but once sized that ratcheting action is nice.
Standard adjustables seem to find their way into whatever I'm doing eventually.