[zerzar]

Google/MS can certainly add this feature (for enterprise accounts) but it would not be trivial. IME "next available" means urgent, and that was not true for 80% of my meetings at work. There were many times I booked a meeting one or two days/weeks ahead, so that I could spend X hours today/tomorrow getting something important done without interruptions or waiting for some progress to be made.

The paid version of our product adds another dimension to optimization by improving room availability/utilization. Our goal is to build an E2E product suite including room tablet SW, guest check-in experience & real estate utilization analytics, which would be more of a challenge for Google/MS to trivially add to their suite. By doing this, we are also able to gather more high-fidelity data about office spaces that doesn't currently sit in G Suite or Exchange.