I have been trialing the DLC recently. It seems to work rather well and solves my problem rather nicely, until it doesn't.
DLC seems to work by having its own filesystem on the container. This filesystem is limit to 50GB across the board. My use case for this feature requires Docker to have access to about 100GB of disk space. There is no way to increase this limit, even for more money.
DLC is a useful feature I am willing to pay money for, but there is no option to pay more money for more disk space which would make it actually work for my use case. This means that CircleCI is losing:
Please, let me give you money for a very useful feature you've implemented!