I have been using the same digital system for over a decade, it has the facility to print a certificate however I have never used it as the pertinent information is retained, backed up and easily accessible, so it would just be a waste of paper.
I totally agree with Al Rosen, as long as the required information is correct and easily accessible the weight of paper doesn’t matter as long as the paper won’t rapidly degrade and the print doesn’t fade to the level of illegibility.