Pseudosustain
Pseudosustain is a technique that was created as a way to sustain short-sounding instruments. For example, a user would chain 1/4 of notes on the smooth synth to simulate a sustaining note. It was more often used on violins, smooth synths, and cellos due to the staccato nature of those sound files. This is somewhat remedied by the inclusion of sustained instruments like the flute and sustained strings.
With pseudosustain, one could create unique sounds that would not be normal on a given instrument.
For example, one chained steel drums and created a low bass note that can be used as an ambient element.
Because of this, many users have been able to make a lot of high-quality music with sustaining sounds without the usage of reverb and delays to increase the tail of the sample.