The perception that "Boris" needed correction due to Mussorgsky's poverty of technique prompted Rimsky-Korsakov to revise it after his death. His edition supplanted the composer's Revised Version of 1872 in Russia, and launched the work abroad, remaining the preferred edition for some 75 years (see Versions by Other Hands in this article for more details). For decades, critics and scholars pressing for the performance of Mussorgsky's own versions fought an often losing battle against the conservatism of conductors and singers, who, raised on the plush Rimsky-Korsakov edition, found it impossible to adapt to Mussorgsky's comparatively unrefined and bleak original scores.