Remington model 700 is the most popular selling rifle in america. The model 700 has been around, and virtually unchanged, since 1962, I think. Something like that anyway. Because of this there are some people who swear by Remington and think 700 actions are flawless. There are many people think the only good rifle action on the market today is the 700. These are the people who say most high-class target shooting custom rifles are based off the 700 action, and the 700 action has won more long range competitions than any other, etc, etc. To these people, who will only consider Remington, many people [myself included] have fun pointing out flaws in the the 700 action just to get a rise out of them. I own 2 remingtons, and they work just fine. Good shooters too, with no aftermarket tinkering. I've been around firearms all my life, and I've never seen a 700 extractor fail. I've heard about it on the internet, and that's about it. I suppose it can happen, but the only reason why I could think it would is if you've got a handload that is too hot, the case over expanded, and when you yank hard on the bolt the extractor would break. If it were a serious problem, then I think Remington would have addressed this issue, and not kept it unchanged since the early 60's. If you buy a remington, keep the receipt. That way if there's an issue you can go bakc to the shop you bought it at and get them to deal with the warranty stuff. If you don't have a reciept then you can deal with remington directly. The wait times are usually long, but most people get their issues taken care of.
Remingtons are good guns. They are not the only good guns out there. I have a Tikka T3 and like it too. I have a browning x-bolt, and I like it. I just picked up a Husky, and am taking it to the range this weekend. Ford, Chevy, Dodge, Toyota, whatever. They all make good products. Vary rarely will one fall apart as you drive it off the lot. But none of them are absolutely perfect and indestructable. Same with rifles.