Not sure what Bit-tech are talking about.

SLC nand programs typically 2x - 3x faster than MLC with some minor benefits for both read and erase speed.

Micron’s enterprise 34nm process nand can currently achieve 30,000 write/ erase cycles with MLC and 300,000 write/ erase cycles with SLC.

(I think I read somewhere that the Gen 2 X25-E will shift to 34nm MLC nand.)

Whilst the SLC write/ erase cycles are much better that MLC the added durability of SLC based ssd’s is also boosted by a much higher percentage of spare blocks. These spare blocks are not seen as available capacity because they are used for wear levelling. The added cost of SLC is therefore higher manufacturing costs plus more spare blocks.

SLC does not degrade like MLC but it does degrade. (One_Hertz will know more).