These microscopic machines are beginning to be applied to commercial applications, particularly in manufacturing and process control, but are not yet in the mainstream.
Statement text from the data file published with the LessWrong 2020 assessment (https://www.dropbox.com/s/jmvciqv7u3rs7x5/Kurzweil_2019.tsv?dl=0), which splits the chapter into 105 statements. The source list repeats the preceding sentence as bracketed context; the context is not repeated here.