I would contact S&W and see if they still do the upgrade, and if they will do it all on their dime, or not. (shipping, etc.)
IF so, it would be sensible to me to have it done. Even though you may never plan on using it for a defensive role, having it upgraded so that the small risk of a primer tying up the gun is removed just seem sensible. That way, if you ever do have to use it in a defensive role, that worry is eliminated.
Also, future owners might thank your memory some day, as it is quite possible that at some time in the future S&W will no longer (be able to) do the work needed.
I think any potential loss of collector value due to having the upgrade done will be balanced with the value of the gun as a more reliable weapon.
While there might be some others, the only place I know of where a factory improvement matters to collector value is with Ruger old model (3 screw) and New Model Blackhawks. And that is because of the nature of the conversion.
The "old model" Blackhawks had a decent trigger pull. New model Blackhawks have a decent trigger pull. according to what everyone says, converted old models had horrid trigger pulls. I've had a 3 screw, and have lots of new model Blackhawks but never had a converted 3 screw so I can't say from personal experience, but enough people say it and believe it that people will pay more for an unconverted old model than a converted one.
The S&W improvement in this case is a much different matter than the Ruger, and I cannot see how it would harm the value of the gun to any significant amount, if indeed, any amount at all. I think it would actually make the gun worth a tiny bit more, but good luck convincing any potential buyer of that.