Southwest new planes have barrier to protect the cockpit when the door is opened mid-flight

My only issue, this is supposed to enhance safety & security. Why on earth do we share what the latest updates to security measures currently are? Congrats SWA for implementing this on your new aircraft; stop telling people what the current deterrents are! I can guarantee if you, as a PAX were to mention ANY change in cockpit protection protocols, even as a simple, "I noticed you don't do XXXX anymore," to protect the cockpit; YOU certainly will become a PAX of concern.

Remember the German co-pilot who locked himself in the cockpit when the Capt left to use the bathroom. He then flew himself and all aboard into a mountain. Perhaps that is why SWA left t(e c in door open.

Having recently flown on Southwest (my first ever flight with that airline), in seats 2C as well as 1A, short flights roughly 1:30 each, I can say I did not see any blocking of the isle when one of the pilots opened the door to use the lavatory. Though one of the fight attendants did "stand in the way" while the pilot entered and exited. Thinking about it there may have been two flight attendants in that area. Maybe, on longer flights, a cart would be used to block the isle. I never saw a galley cart while on my flights

Before traveling this time my biggest concern was an unruly passenger - I had been watching too many YouTube videos. I happy to say none were seen on my flights nor in any of the airports through which I passed.

Pilots use of the lavatory is a small window of vulnerability and most/some passengers have Flight 93 in the back of there minds, at least those old enough to remember 9/11. There are now people old enough to vote who were born after that tragic day.

Why is it not solid? Bullets, liquids and gases would not be affected by this "barrier".

Probably not a bad idea just to protect the pilots from Southwest's legion of pissed off customers.