Well, RCS was originally more fragmented before Google. Each carrier wanted to handle RCS messaging differently. T-Mobile made their own, but it only worked with other T-Mobile users.
Google was tired of waiting for all the carriers to agree and come up with their universal cross-carrier RCS platform, so they decided to come up with something that works with Google Messages, which is generally accepted as the RCS standard now.
Well, RCS was originally more fragmented before Google. Each carrier wanted to handle RCS messaging differently. T-Mobile made their own, but it only worked with other T-Mobile users.
Google was tired of waiting for all the carriers to agree and come up with their universal cross-carrier RCS platform, so they decided to come up with something that works with Google Messages, which is generally accepted as the RCS standard now.