I wonder if pushing 40k rows to mobile is such a bad idea. Phones have tons of space now. HD video streaming pulls tons of data. I guess mediocre mobiles complicate matters. Usually there are other factors making it implausible. Such as not compressing/compacting the data on the server, and not being able to limit large blob data columns, unable to control the parsing of data, and lack of normalized relational caching on the client. Usually it’s a collection of backend and frontend frameworks that complicate all this. I’m feeling more and more we need thick efficient clients.