“We have recently discontinued certain older versions of Creative Cloud applications and and a result, under the terms of our agreement, you are no longer licensed to use them,” Adobe said in the email. “Please be aware that should you continue to use the discontinued version(s), you may be at risk of potential claims of infringement by third parties.” Users were less than enthusiastic about the sudden restrictions.

Note the third parties part there.

For example, Adobe's previous license for Pantone colors expired last year ( https://www.theverge.com/2022/11/1/23434305/adobe-pantone-su... ).

“As we had shared in June, Pantone decided to change its business model. Some of the Pantone Color Books that are pre-loaded in Adobe Photoshop, Illustrator, and InDesign were phased-out from future software updates in August 2022,” said Ashley Still, senior vice president of digital media marketing, strategy, and global partnerships at Adobe in a statement to The Verge. “To access the complete set of Pantone Color Books, Pantone now requires customers to purchase a premium license through Pantone Connect and install a plug-in using Adobe Exchange.”

If you continue to use Pantone colors that were available in an older version of photoshop, a third party (Pantone) may sue you - not Adobe suing you.