You can disagree
Carriers don't always get faster updates, and it was great back then Samsung messages had RCS , Google's message is way to go today and better RCS protocol we see if Samsung messages be around in the future which I think probably won't.
Yes carrier and unlock version are interchangeable when flashing, good thing for carrier version that want to go to unlock version with no carrier splash screen added apps , yes TMO version Unlock or carrier show 5G UC .
Fun facts;
Sprint back in the days was only carrier to show RCS with Samsung messages on unlock version.