I have seen in internet and books that the largest practical unit for mass is Chandrasekhar limit which is 1.4 times the mass of sun. It gives the minimum mass for a star to become a neutron star. But there is a bigger unit called TOV limit which gives the minimum mass required for a star to become a black hole which is 3 times the mass of sun.
Are these units the largest natural units of mass?
Would these units of mass be more useful than the solar mass?