A execução de ubuntu-support-status
dirá quanto tempo o suporte dura de tudo que você instalou, aqui está a saída do meu como exemplo:
Support status summary of 'ivory':
You have 1904 packages (75.7%) supported until April 2021 (5y)
You have 14 packages (0.6%) supported until January 2022 (5y)
You have 83 packages (3.3%) supported until April 2019 (3y)
You have 237 packages (9.4%) supported until January 2017 (9m)
You have 80 packages (3.2%) that can not/no-longer be downloaded
You have 197 packages (7.8%) that are unsupported
Run with --show-unsupported, --show-supported or --show-all to see more details