Haven't seen the Pro, but the idea of a striker fired pistol with no safety is a thing I don't want in my house. I've never understood the mindset of people who don't like a safety on a striker fired gun, when all they have to do is not engage it. It seems that if the afety is there, they seem suddenly to need it.
Me, my lifetime of auto pistols have had a safety that must be flicked down, like a 1911. If it were not present, I'd be uncomfortable. A thumb safety does not slow down your time in getting off a round. It's disengaged as you draw. It seems these days that so many buyers of pistols are vastly inexperienced and are afraid that they'll get flustered if the gun is needed and fail to take the safety off. I don't think those people should carry any striker fired pistol. More Glocks have fired inadvertently due to the owner pressing the trigger than any other striker fired pistol. (No, I don't have data to back that up. It's just that accidental discharges of semi-autos are more prevalent in the news.) I'm 67 and have been shooting pistols since I was a teenager. I tell you plainly I would never own a Glock due to the lack of safety, not to mention the other negatives I wouldn't want to list because we all know what they are and I would just cause a rift.
Regarding the SR9, new or old, they have no accuracy sufficient beyond "usual" self defense needs." At 25 yards, they have the accuracy of a J frame 5-shot. Who needs a carry gun with 25 yard capability? That's a whole other consideration. For me, precise accuracy in a plastic striker fired gun is very much a consideration. I would not give that up to carry a more comfortable LC9 Pro, especially since it has no safety.
Don't mean to debate. Flicking the safety off is as natural as unzipping my pants before firing. That's just me. If you are young or fairly new to semi's, or if you've had limited experience with safeties, the no safety striker fired might be for you, except that those facts alone may mean it's definitely not for you.