I dunno about the m1 aspect of this but postgres and redis for typical dev work shouldn't require more than a gigabyte or two of RAM when running together. 32-64GB is more like heavy traffic enterprise DB territory...
guess the parent is annoyed at spending 2-3GiB of ram on the VM itself.
even if the containers themselves only use 128MiB total: the VM will cordon off everything it's told to; which most people are unlikely to change until there's an issue, and is configurable down to 1GiB as a minimum.
FWIW Docker Desktop on my machine (M2 Macbook Air; 24GiB Ram) defaulted to using 8GiB of RAM.
even if the containers themselves only use 128MiB total: the VM will cordon off everything it's told to; which most people are unlikely to change until there's an issue, and is configurable down to 1GiB as a minimum.
FWIW Docker Desktop on my machine (M2 Macbook Air; 24GiB Ram) defaulted to using 8GiB of RAM.