>>10927144nta but it depends on the kit. I usually do sub-assembly, especially for tracks, but sometimes the kit construction makes it impossible or nearly so.
eg. I'm working on AFV Club's 1/48 early Tiger, tooling from mid/late 2000s. the tracks+running gear are designed in such a way that dry-fitting them, gluing them, then removing them from the tank hull might be nearly impossible. I may have to bite the bullet and glue it all onto the tank, then do my best to prime & paint as many crevices as possible. I'm hoping not, but the alternative might be very difficult. (the tracks are vinyl which probably makes it harder)