I would say official support for multiple GPUs should be top priority. I am trying to convert a 3 minute film from 16fps to 64fps, and it is likely to take over 2 days on a single 1080ti. There are render farms on the cloud that support GPU rendering but without multiple GPU support this could get unfeasibly expensive.
For example, https://www.xesktop.com/ lets you login via remote desktop and run your own software. Their machine specs and prices are listed below. With multiple GPU support suddenly using DAINapp for longer films actually becomes a viable option. Instead of 48 hours and $288 , now I could get it done in 5 hours for $30.
GPU servers specs:
Node type 1
- CPU: 2x Intel Xeon CPU E5-2620 v4 @ 2.10 GHz
- RAM: 128-256GB
- GPU: 10 x NVIDIA GeForce GTX 1080 Ti, 11GB VRAM
- OctaneBench 4: 2093
- Price: $6 USD per hour
Node type 2
- CPU: 2x Intel Xeon E5-4627 2.6 GHz
- RAM: 128GB
- GPU: 8x Nvidia Tesla V100, 16GB VRAM
- OctaneBench 4: 2978
- Price: $12 USD per hour