Realistically, anyone who buys a 710 will not likely fire enough rounds for headspace to become an issue. I imagine the steel in the barrel is good, ditto for the locking lugs. This isn't a target rifle and won't be used in competition, so total round count for an average 710 would not likely reach 1,000 over its entire life, probably less than 500. With that in consideration, the average 710 user would never have headspace issues. And, if headspace becomes a problem, then the barrel is probably too worn to be of any use anyway.
Of course, the same can be said for the average Stevens 200 or Mossberg 100ATR user. However, should an issue arise, the Stevens and Mossberg users would have the same recourse that the super customized Dakota owner has.
Ash