If there was one thing metal never had a lack of, it's shredders. Even the supposed 'dark age' of metal (90s) had virtuosos in abundance: Dimebag, Michael Amott, Jeff Waters, Timo Tolkki, Chuck Schuldiner, Jeff Loomis, John Petrucci, Muhammed Suicmez, even Roope himself, whom I always rated as much as Aleksi in terms of technical abilities. Shred never really went anywhere for it to be brought back.
And to be frank, Aleksi was such a fantastic writer, be it a lead or a riff, it's stupid for us to fixate so much on his technique to begin with. Writing was his strongest side and music of such quality is hard to come by, unlike a lot of the stuff from the guys listed above