First off, Drake is a Canadian icon and one of the most successful rappers ever. His rise to fame was cemented by his invention of the OVOXO genre. From there, Drake has made countless radio hits and memorable viral tracks. In a couple years, his talent will resurface because the attention span of the internet is really small.
The Kendrick diss battle started like a cypher and ended like a lawsuit. The only reason that was a KO to Drake's momentum was because his current music is 99.99% fueled by hip hop culture rather than artistic talent. I don't mean he's not making good music, it's just not as good as the music that made him famous.
Drake's secret weapon is his pull with females. If he could maintain a serious relationship like Kim and Kanye, he'd be helping hip hop culture heal from indoctrination while reminding the culture why they put him on initially.