They have been trying to do this since the S25 was released. But then it popped back up in the Galaxy Store shortly after launch.
For a few weeks, up to just a few days ago, my RCS in Samsung Messages had stopped working. But now it's back amd working. The biggest draw to Samsung Messages for me, is the customization with groups/categories, custom wallpapers, scheduled Messages, custom tones. Just all the customization overall. For me, those are everyday things used. I don't use the react emoji, so that isn't an upgrade to me.
I also don't really want google or meta to have any more info on me than they already have. Thats why I haven't used Google Messages or WhatsApp.