I doubt this would happen. Lr structurally and from a vision perspective is organized around a central cloud system.
As a consumer, I would also down vote this idea if I could, since it would potentially take away resources from actually needed features that have no work around (the work around here is to use the correct product) such as manually adding People to photos (not keywords, and people not found by the AI).
Sorry, you did say that in your opening suggestion. I get your frustrations - there is a limited space in the cloud, there are sync errors and some tools are overly complicated compared to others, given different experience levels. In the interim, you could also reconsider your backup strategy if you are loosing files. Data loss can happen anytime and anywhere. Consider the 321 Backup idea. Make three backups using 3rd party tools, on at least two different media, and keep one off-location (a portable external drive or cough-cough --the cloud).