CJ, I had a root canalled tooth for over 30 years and never had a problem with it. If they are done properly there shouldn't be a problem. The only thing that happened with this tooth was I cracked the tooth's root 2 years ago and then had to have it pulled. My dentist told me that old root canaled teeth can become brittle and break like mine did.
If you pulled these teeth then what would you have?... empty spaces in your mouth that you would have to deal with. You would either need a bridge or implants or denture. Each of these treatments have there draw backs too.
I now have a dental implant and I can tell you I would rather have my root canalled tooth back anytime. As good as implants are they don't feel like the real thing.
Implants feel like a rock compared to a real tooth. Real teeth have a cushion between the bone and teeth, but implants do not. I never realized this until I could felt the difference. It takes awhile to get use to the difference.
I don't have a bridge so I can't give you any idea of what that feels like. You would have to have teeth drilled down and capped to hold the bridge. So you would lose your root canaled teeth and then have to damage your other teeth to fix the empty spaces. There also would be bone loss.
You could also can wear a denture and or partial to fill in the spaces. You would have to deal with this slipping out of place and bone loss.
I wouldn't have any teeth pulled unless absolutely necessary. Your own teeth are the best even if they have a rooth canal. Follow up closely with your dentist and there shouldn't be problems. Go every 6 months for cleanings and a dental exam to make sure all is good.
"T"