SIA claims all their planes are less than 3 years old..
"Is there any technology to help predict or mitigate turbulence?
Modern aircraft are equipped with advanced weather radar systems that help in detecting storm-related turbulence. Some newer models, like Boeing's 787, also include technology designed to reduce the effects of turbulence."
https://www.google.com/search?q=can+pilo...turbulence&oq=can+pilot+radar+detect+air+turbulence+&gs_lcrp=EgZjaHJvbWUyCQgAEEUYORifBTIHCAEQIRigATIHCAIQIRigATIHCAMQIRifBTIHCAQQIRifBdIBCTE5Mzg1ajBqNKgCDrACAQ&client=ms-android-oppo-rvo3&sourceid=chrome-mobile&ie=UTF-8#:~:text=Is%20there%20any%20technology%20to%20help%20predict%20or%20mitigate%20turbulence%3F%20Modern%20aircraft%20are%20equipped%20with%20advanced%20weather%20radar%20systems%20that%20help%20in%20detecting%20storm%2Drelated%20turbulence.%20Some%20newer%20models%2C%20like%20Boeing%27s%20787%2C%20also%20include%20technology%20designed%20to%20reduce%20the%20effects%20of%20turbulence.