Lane Johnson is still one of the best offensive linemen in the NFL. There's no debate when it comes to how good Johnson has been and his future Hall of Fame status. When Johnson is on the field, he's dominant. The Eagles should allow Johnson to play right tackle as long as he wants -- or as long as his body allows him to. There is still one question that's up in the air. When will Johnson decide to call it a career? And if he does, will the Eagles be ready to have his successor in place? The Eagles came into this draft hoping to find Johnson's successor in Round 1. That didn't happen, leaving the franchise to pivot to other areas of the roster. Not only didn't the Eagles select a tackle in Round 1, they didn't even select a guard in Round 2. They did well in other areas, but pushed back the future of the offensive line down the road. There sits Johnson, who turns 36 years old on May 8, as the offensive tackle for 2026. Maybe even 2027 as well.…