Adding to Shaked’s point: persistent memory can become stale and deciding what to retain and trust is a security trade-off. The current stateless approach, combined with the code sandbox, can rebuild context quickly. The idea is to add smarter memory without losing that property.
First, it's terminal first, meaning you can use your existing subscriptions and take advantage of any and all the different provider CLI's.
Second, it's a persistent workspace so you aren't locked in to whatever features the provider's build. Instead you can really drive your own workflow as you see fit.