Not sure what you have read and where. A forum is the worst palce to find this information as guys who post a problem may be the problem. You don't know the persons ability or qualifications and what they contributed to the issue. Since it is the best selling pump shotgun on the Market there are more out there so of course you would read more about them.
As for the 870. They are as good today as any time. Same weapon with almost no changes in 50 years. Over 10 Million sold and most all still in use unless lost or destroyed.
That Wingmaster will be in your family for many years to come and will passed down to your children and their children if maintained.
J.D. McGuire, Owner
AI&P Tactical, LLC
Remington Factory Certified
Law Enforcement Armorer