(According to Daniels they eventually joined the UFP.)
Obviously the real life reason is that Enterprise was made after those other series.
Other than that though I wondered if anything had ever been put in canon (or even quasi-canon, like a producer or writer or one of the ST bigwigs making a statement in an interview or what have you) by way of explaining why they are never seen "again".
Obviously the real life reason is that Enterprise was made after those other series.
Other than that though I wondered if anything had ever been put in canon (or even quasi-canon, like a producer or writer or one of the ST bigwigs making a statement in an interview or what have you) by way of explaining why they are never seen "again".