And now for my personal opinion:
I really adamantly don't like magazine disconnects.
First and foremost I think they are highly annoying.
I've been shooting for most of my life (22 out of 28 years) and consider myself an experienced and safe shooter.
I follow the weapon safety rules instilled in me when I began shooting, and re-instilled (with force and repetition) in the Corps.
One of which is never put your finger on the trigger until you intend to fire.
However I do like to dry fire quite a bit to practice my trigger pull, especially since I have several different handguns.
And unfortunately the 2 newest pistols I bought have magazine disconnects.
I like to keep my mags loaded, not so much for defense (and I don't cc) but just for convenience because I go to the range frequently and spontaneously.
Now with a pistol that has a magazine disconnect I have to keep an unloaded (or unload a) magazine so that I can safely dry fire that pistol.
Also I am not a huge fan of dry firing with a mag inserted in general just because that adds an extra element of potential danger.
Another annoyance with this feature is for competition shooting. I have not yet gotten into competition shooting (but hope to eventually), but I have heard reports of how magazine disconnects are a real hassle in some competitions because of the clearing rules they have. They have had to adopt new clearing procedures that take longer just to accommodate magazine disconnects.