Although jazz-rock fusion reached the height of its popularity in the 1970s, the use of electronic instruments and rock-derived musical elements in jazz continued in the 1990s and 2000s. Musicians using this approach include Pat Metheny, John Abercrombie, John Scofield and the Swedish group e.s.t. Since the beginning of the 1990s, electronic music had significant technical improvements that popularized and created new possibilities for the genre. Jazz elements such as improvisation, rhythmic complexities and harmonic textures were introduced to the genre and consequently had a big impact in new listeners and in some ways kept the versatility of jazz relatable to a newer generation that did not necessarily relate to what the traditionalists call real jazz (bebop, cool and modal jazz). Artists such as Squarepusher, Aphex Twin, Flying Lotus and sub genres like IDM, Drum n' Bass, Jungle and Techno ended up incorporating a lot of these elements. Squarepusher being cited as one big influence for jazz performers drummer Mark Guiliana and pianist Brad Mehldau, showing the correlations between jazz and electronic music are a two-way street.