For low volume (sub 100k units?) they're often the only good way to do configurable* SERDES in any environment that is latency sensitive. Configurable as in o

For low volume (sub 100k units?) they're often the only good way to do configurable* SERDES in any environment that is latency sensitive. Configurable as in one SKU is in several products, but not necessarily reconfigurable by the end user.