First, the MSDS indicates this is a Metol-Hydroquinone developer. Second, it does not makes sense to say Metol-only developers are prone to any kind of sudden death. The shelf life of a developer depends on the entire formula. Even packaging is an important variable.
Rollei RLS is identical to CG512 and similar to Perceptol and Microdol-X. All these developers give slightly finer grain by giving some speed.