One of the most visual changes in 2021.7 was the expansion of the UI Theme engine. Avid introduced the "Dark" and "Classic" themes in 2020, but this version allowed for much deeper customization.
Pro Tools 2021.7.0 is a maintenance-focused release that improves stability, compatibility, and workflow polish for Avid’s industry-standard DAW. Below is a concise, reader-ready blog post you can publish as-is.
Pro Tools 2021.7.0: What’s New and Why It Matters
Pro Tools System Requirements and Compatibility - Knowledge Base
If you remember one thing about "Pro Tools 202170," remember this: The Hybrid Engine allows HDX users to play native plugins on auxiliaries and masters while still tracking through DSP on audio tracks.
If you are an audio engineer, producer, or sound designer, looking at what Pro Tools 2021.7 brought to the table reveals exactly why this DAW continues to dominate the commercial audio world. The Power of the Grid: Unrivaled Editing Precision
As you can see, the 2021.7 update fits into a very specific role in Avid's strategy.