Getting tired of pistols with holes in the top of the slide...

[hile]

I don't see the need for it for cosmetic reasons. For the 17L and 24, for a ported barrel (like the C-series Glocks), or for the older 34/35, I'm fine with it.

[1986s4]

I tend to go at least two thousand rounds between cleaning on the 92 platform, just adding lube before matches. It is a reliable platform, but people have agendas and opinions. Needs lube, though.

I also don’t like open slides on guns originally designed to have closed slides.

It has been my experience with the M9 that it shoots rather clean. That is, the open top doesn't trap unburnt powder and other stuff after firing, it's just open so it gets thrown clear. Slide cuts are fine for a competition piece and I assume it's done for lightening the slide, reducing moving mass.