Honestly, the drill does not bother me whatsoever. After a bad root canal and someone fixing it up after an infection, drills are like walking through rainbow fields with unicorns and happiness.

However the potential of this is amazing. There are other implications of fillings. If you keep getting fillings in the same tooth, eventually you will need a root canal which means... a dead tooth, which is bad. However this will make your tooth regenerate meaning that there is no filling and thus the hole never gets "deeper" approaching your root. This will not only eliminate the drill for small holes but can potentially reduce the total number of necessary root canals. Maybe long-term treatment could cause teeth to completely regenerate, maybe pain for a year, but pain for a year for a completely healed tooth is worth it vs fillings which are a patch-up. Can't wait till this is a reality.