Yea or Nay? A Weld-Free Bike Frame with "Mortise & Tenon" Joinery

Bike nerds, I need to hear from you: Are the welds on bike frames typically a problem? An upstart manufacturer called Vanpowers Bike thinks so, and designed the frame of their City Vanture e-bike to be weld-free. "Many one piece frames are heated at high temperatures after welding," the company writes. "The frame tends to deform after being heated, and repeated manual correction and grinding will cause the frame to have a center deviation, resulting in an uneven and fragile frame structure...