As of January this year, Segerstam, a prolific creator of Symphonies, had written 371 of them.

Nowak’s edition of the 1890 score. February 28, 2015; Barbican Hall, London.

https://www.classicalsource.com/concert/bbc-symphony-orchestra-leif-segerstam-bruckners-eighth-symphony-bbc-singers-james-odonnell-in-motets-by-j-s-bach-bruckner/