My guess is that such a vaccine would take longer to develop, but I'm not sure about that.
Wiki also lists the following drawbacks:
In rare cases, particularly when there is inadequate vaccination of the population, natural mutations during viral replication, or interference by related viruses, can cause an attenuated virus to revert to its wild-type form or mutate to a new strain, potentially resulting in the new virus being infectious or pathogenic.[34][39]
Often not recommended for immunocompromised patients due to the risk of potentially severe complications.[34][40][41]
Live strains typically require advanced maintenance, such as refrigeration and fresh media, making transport to remote areas difficult and costly.[34][42]
https://en.wikipedia.org/wiki/Attenuated_vaccine
My guess is that such a vaccine would take longer to develop, but I'm not sure about that.
Wiki also lists the following drawbacks:
In rare cases, particularly when there is inadequate vaccination of the population, natural mutations during viral replication, or interference by related viruses, can cause an attenuated virus to revert to its wild-type form or mutate to a new strain, potentially resulting in the new virus being infectious or pathogenic.[34][39]
Often not recommended for immunocompromised patients due to the risk of potentially severe complications.[34][40][41]
Live strains typically require advanced maintenance, such as refrigeration and fresh media, making transport to remote areas difficult and costly.[34][42]