Searching lemmyverse.net yields the following:

• !tesla@lemmy.world (most subscribers)
• !teslamotors@lemmy.zip (most active users)
• !teslamotors@lemmy.ml (last post 4 months old)
• !tesla@lemmy.ml (empty)
• !teslamotors@lemmy.world (empty)
• !realtesla@lemmy.world (active)
• !teslamotors@lemmy.sdf.org (only 2 posts)
• !tesla@lemm.ee (empty)

Niche communities:

• !superchargers@lemmy.world
• !teslainvestorsclub@lemmy.world
• !teslamodely@lemmy.world
• !teslasweden@lemmy.world
• !shanghai_gfsh@chinese.lol

Niche instances:

• !tesla@gearhead.town (empty, but on a topic-specific instance)
• !teslamotors@lemmit.online (one-way Reddit bridge, serves a different purpose)

My hunch in this case would be to leave the niche communities and instances as they are, and consolidate the rest to lemmy.zip (most active users).

Thoughts?