1. PRLB is not a 3D printing company. It doesn't make 3D printers, but seling 3D printer ink materials.
2. The problem with 3D printing is because of higher cost. One reason is the INK too expensive. Thus company like DDD and SSYS may looking for different source for the INK, Maybe they try to get from China or Isreal. As the trend of INK material goes down, the margin of the PRLB can not be kept at the same level forever.
If the new material invested by other companies. PRLB may suddely facing problems.
3. That's whay we don't see many fims UPGRADE the stocks.