General consensus is that porting isn't such a good idea for a carry gun.
Must be by people with no experience with a ported gun.
What Webleymkv said is good info. Yes there's low flash but debris could and would possibly strike you in the face or eyes under certain conditions especially if the gun would be used for self defense.
Pure speculation with a catch-all phrase tagged on in an attempt to be non-specific and cover any eventuality that could happen anywhere in the universe. I could also be sitting in my living room and a jet engine could fall off of an aircraft under "certain conditions" and kill me because I live near the flight path of an airport.
I have had a Detonics Combat Master since 1982. It was a snarly, hard to handle pistol because of the short barrel and reduced grip size. I used to own a machine shop and had an EDM, so I ported my own guns. The first gun I ported was the Detonics in 1984. After porting, the gun became far easier to shoot, and was my carry gun for the next 25 years.
I have never found problems with gas or debris hitting me in the face. The muzzle blast from the ported and unported pistol is exactly the same. If the gun is ported correctly, that is at a 45-degree angle to the bore axis, any gas or debris is vented away from your line of site.
The same with flash. This is an imaginary problem as far as I can tell. If you're not blinded by the muzzle flash - then the flash through the ports won't blind you either. Again, if the gun is ported at a 45-degree angle to the bore axis - the flash forms a "V" that is NO DIFFERENT than using an AR style rifle with a flash hider.
Most of these reasons for not having a gun ported are imaginary or speculative. I have three ported pistols and have never, in nearly 40 years of shooting them, had the problems you find touted by the "experts" on the Internet.
I just got a Ruger Super Redhawk Alaskan, and that gun is going in for porting at Gemini. I can hardly wait to have it done as it will become an even better revolver to shoot as it will be more controllable for follow up shots.