there were instances in Ozzy Osbourne's career with Black Sabbath where substance abuse had significant effects. Ozzy Osbourne was the lead vocalist of Black Sabbath, one of the pioneering bands in the heavy metal genre. He joined the band in 1968 and remained with them until 1979 before pursuing a successful solo career.
During his time with Black Sabbath, Ozzy's substance abuse issues, particularly with alcohol and drugs, had a detrimental impact on his performance and behavior, leading to tensions within the band. His struggles with addiction were well-documented, and it became increasingly difficult for the band members to continue working together.
The turning point came in 1979 when Ozzy was fired from Black Sabbath due to his excessive drug and alcohol use and unpredictable behavior. After parting ways with the band, Ozzy went on to pursue a solo career and achieved tremendous success, becoming known as the "Prince of Darkness."
Meanwhile, Black Sabbath replaced Ozzy Osbourne with Ronnie James Dio as their new lead vocalist, releasing successful albums like "Heaven and Hell" and "Mob Rules."
In the years following his departure from Black Sabbath, Ozzy managed to overcome his substance abuse issues and make a successful comeback in the music industry. He reunited with Black Sabbath for various occasions and tours, and in 2013, the original lineup of Black Sabbath, including Ozzy Osbourne, reunited to record a new album called "13" and embark on a farewell tour. This reunion marked a significant moment in rock history, as it brought together the classic lineup of one of the most influential bands in the genre.
Keep in mind that the information may have changed or been updated since my last knowledge update in 2021. It's always a good idea to verify with more recent sources for the latest information on Ozzy Osbourne and Black Sabbath.