Non-illuminated I feel might be a trap for the manufacturer though. most of them design the reticle assembly with the illumination built in these days, so taking it out isn't as simple as older scopes. plus it leads to SKU bloat. So a fractional cost savings for the consumer, but a lot of extra overhead in manufacturing.
Standard accessories s a good one though, and I'll even throw another thing in: Standardized threads on Objective and Ocular for a given outer diameter. That way more accessories like sunshades, ARDs, hard lens caps, filters, clip-on mounts, etc would be compatible across a wide range of optics instead of very model-specific.