Yes, exactly. When people talk about about "modern" in the context of software performance, it usually denotes software architecture choices. If someone did a f

Yes, exactly. When people talk about about "modern" in the context of software performance, it usually denotes software architecture choices. If someone did a forklift upgrade to the software architecture of Redis etc, then they would be modern too. In practice, software architecture is forever. It is nearly impossible to change the fundamental architecture of software people use because applications become adapted to the specific behavioral quirks of the architecture i.e. Hyrum's Law, which would not be preserved if the architecture was re-designed wholesale.