https://www.epo.org/en/node/when-will-classic-espacenet

When will classic Espacenet be discontinued and when will the classic Espacenet national/regional interfaces be migrated to new Espacenet?

The date for the migration of the national and regional interfaces from classic Espacenet to new Espacenet has not yet been decided. This means that the date for discontinuing classic Espacenet has not been decided yet either. It is planned that the links which work with classic Espacenet will also work with new Espacenet.