...settle down, guys. Smoke 'em if you got 'em. Feeling better? Good!
The number one risk factor for periodontal disease is tobacco use. I'm not talking about surface inflammation only(gingivitis), I'm talking about invasive destruction of the bony support of teeth (and implants). It is logical to assume that the chances of long-term success of an implant are seriously compromised by smoking. Would you rather your dentist take your money, subject you to the risks associated with implant surgery, and then be of no help when it fails?
There is no man-made replacement for a natural body part that is as good as what nature provides. And, in the case of teeth, that's saying a lot because dental problems are nearly pandemic. A careful consideration of the potential benefits relative to risks should be considered prior to any invasive procedure.
As always, what do I know (?) and your mileage may vary...