If an SSD is written to once, and kept powered on (and at a temperature in the low 70s), while getting regular reads, how long can I expect this drive to last?

If an SSD is written to once, and kept powered on (and at a temperature in the low 70s), while getting regular reads, how long can I expect this drive to last? If that drive is powered on, but kept at low temperatures (say near or below freezing), does this help it survive longer? What failure modes would occur in such an environment? Would it just be power surges frying the thing, static electricity?