Stock compressor,mod for 134a ?

Why convert to R-134A when it has been outlawed for years in many countries and phasing out in 2017 in the U.S.? I have Duracool HC refrigerant in all of my vehicles now. I converted the 1996 & 2002 after their compressors failed. I have used it in my 1965 Newport since 2002 (after R-134A). Many claims it can "explode" from people who nothing of combustion (AC shops), but no reported fires after use in millions of cars for many decades, except an Australian AC guy who manufactured a fire. Whatever refrigerant you choose, consider PAO 68 oil since more efficient and doesn't absorb moisture like PAG does.