Certainly a range of opinions.

At 65 years of age with arthritic hands I'm finding iron sights a bit challenging.

I have a green dot on my S&W M&P 22 and I can burn out the bullseye at 15 yards. I have only irons on my 9mm Shield 9mm and don't do so well.

My 9 is my CC weapon and I really need to have confidence, which is a part of having skill, to hit where I'm aiming. If a microdot helps in any way -- I'm all for it.