For individual users: While Adobe rarely sues end-users, using a pirated portable version violates the license terms. Companies using such versions face audits, fines, and bad-faith legal exposure. Education institutions can lose Adobe campus licensing.
If you need a portable vector editor, use from the official PortableApps.com repository. If you need Adobe Illustrator specifically, subscribe to Creative Cloud and use the official installer (which is not portable but supports silent deployment and can be run from external drives with symbolic links as a workaround – though not officially supported). For individual users: While Adobe rarely sues end-users,
Remember: In design, as in security, shortcuts often lead to costly redos. Choose legitimate tools for a safe, professional workflow. as in security