TDE - Impact on TempDB and other Unencrypted DBs in that Instance

Once TDE is enabled on a DB tempdb automatically gets encrypted.Once the TempDB database is encrypted, any reference and use of this database by other databases, regardless of whether they have TDE enabled or not, will require encryption and decryption.[url]https://www.simple-talk.com/sql/database-administration/transparent-data-encryption/[/url]Does the above statements mean that all DBs in this SQL server instance need to be TDE enabled?Please provide some thoughts on this.Many thanks!