While everything seems fast, it would be nice if the upgrading/downgrading of a droplet was quicker. Right now the process of scaling up takes much too long.

I agree. I have a lot of services running on my machine which i have to stop before shutting down and upgrading which makes the 1min downtime change to 5-10mins.
Many other 'smaller' providers even allow upgrades in real time without any downtime.
Even if you could replicate the vm in real time to an upgraded spec with just a few seconds of downtime for the switch of ip address would be a massive improvement.
Just an idea :)

Unpossible

Unsure about no downtime but at least a process available that does this for you. Instead of doing it by hand which cost another extra ~30sec downtime.

As cloud is all about be able to scale up and down easily, it should be possible to do that without downtime.

My clients and I cannot afford 30-60+ minutes downtime for shutting down a droplet, creating a snapshot, then resizing the disk. (And I don't want to wake up at 2 AM to perform this operation.)

Also would love to see the ability to keep the same IP on downgrade too.