Impressive. How can you wait all those long times before getting results for your researches is beyond me :p physicists' patience is under appreciated!

In 2019, an upper limit of 1.1 eV was set on the neutrino mass
...
the sum of the three neutrino masses has to be smaller than 0.26 eV.

Sounds like a factor of 5 isn't enough? You mentioned "some can be massless" in one of our convos before, can 2 of them be massless and just 1 has the mass, or is there no clue yet?