The samsung 840 EVO TLC NAND has an official rating of 1000 cycles, although reaching 2000-3000 in an endurance test is fairly typical, and quite an amazing feat of engineering.
So yes SSDs have less than 1000 write cycles.
besides the endurance tests for Ultra SSD are:
http://ssdendurancetest.com/ssd-endurance-test-report/SanDisk-Ultra-Plus-SSD-64
So, yeah YOU SHOULD BACKUP more often!
