Get in touch with your CSAM. They will be able to get you assigned a capacity manager, if you don't already have one assigned.
It is the function of the capacity manager to help you plan ahead based on what the data center capacities look like going into the future.
Meet monthly with your capacity manager. Get representation across different technology interests - database, compute, storage, event hubs, etc. Don't ever skip these meetings.
Not much better than "meet with Infrastructure in Nov to plan next years capacity and server purchases" for on prep -- has Azure really degraded down to this?
It's quite a bit better than that, in fact. They talk to their customers to try and understand all the big deployments coming to understand if there is going to be a crunch at the region/AZ level.
I'd be surprised if other cloud providers aren't doing that in some form. I only have experience with Azure (so far).
It is the function of the capacity manager to help you plan ahead based on what the data center capacities look like going into the future.
Meet monthly with your capacity manager. Get representation across different technology interests - database, compute, storage, event hubs, etc. Don't ever skip these meetings.