If most SSD manufacturers used MLC memory chips for their SSD models, this is only because one can reach higher storage space at a cheaper price, when compared to SLC which is faster in random access and offer longer lifetime. Nevertheless, there is a growing market for SLC-based SSD: storage units for servers. OCZ designed a new model especially for this purpose: Agility EX.
This is the first SLC drive with a "cheap"/reasonable price: It will cost you 400 € for 60 GB. thanks to a Indilix Barefoot controller, it offers 255 MB/S and 195 MB/s respectively in reading and writing mode. To capture the entire server market, manufacturers will have to also offer such SSD with a SAS interface.