Complex sentence: It remains to be seen, however, if these recordings, which have mostly been well-received by reviewers, will earn Tovey a permanent place in the canon of 20th century British music, or whether he will remain a niche composer.
Split into simpler sentences: It remains to be seen, however, if these recordings, which have mostly been well-received by reviewers, will earn Tovey a permanent place in the canon of 20th. Century British music, or whether he will remain a niche composer.