Can we intelligently wait for `dev/get-ajax`?

[lread]

Problem/Opportunity
Our docs state that dev/get-ajax and dev/get-requests will flush the internal buffer that holds these requests.

So how can we wait for the buffer to have filled before calling these functions.

In #527, 2 seconds was no longer enough for CI, so I bumped the wait to 10 seconds.

But I'd rather just wait (with a reasonable timeout) until the request is complete. Is that possible?

Proposed Solution
Dunno, depends on 3rd party chrome devtools support.

Alternative Solutions
none yet

Additional context
none

Action
I'll eventually look into this.