It does not leave behind residual files or background processes like the Adobe Creative Cloud Desktop app.
Portable versions often strip away non-essential background services, potentially saving CPU and RAM for the actual rendering process. System Requirements for X64 Portable Adobe After Effects CC 2019 16.1.3.5 X64 Portable
Seamlessly remove unwanted objects (like boom mics or logos) from video clips. It does not leave behind residual files or
High-speed SSD for the portable folder and disk cache. Best Practices and Risks Adobe After Effects CC 2019 16.1.3.5 X64 Portable