With the way the constellation works (needing regular replenishment of satellites as they deorbit every 5 years or so), not currently supporting NTN isn't a big

With the way the constellation works (needing regular replenishment of satellites as they deorbit every 5 years or so), not currently supporting NTN isn't a big deal. If it sufficiently catches on, the satellites being launched will be given the necessary upgrades and over time the entire constellation will end up with the necessary upgrades.