Alfred Nobel (1833-1896), the inventor of dynamite, was a chemist, engineer, businessman and, most memorably, philanthropist; he was also a scholar, fluent in Russian, French, English and German. Above all, he loved poetry.
There is a tradition of violinists either writing their own cadenzas for this concerto or transcribing the ones Beethoven wrote for the piano version of the piece.
The virtuoso trumpeter nevertheless understands that performances of HK Gruber's concerto are risky undertakings for any orchestra, which is why he appreciates how easy Andris Nelsons and the BSO make it look.