Derek Bourgeois

[Scion7]

But after No. 7, none of his next 109 symphonies were performed for orchestra (in his life time). 

Yes, I am updating the works list I posted and just saw that enormous output.
There's no way quality could be maintained - he was not a GREAT composer - he was an off/on good one, from what I've listened to today, so far.  He wasn't Haydn, after all, composing symphonies over the stretch of his life.  Those later grinding-it-out symphonies were all composed over only 14 years.
Nobody's that inspired!