Why shouldn't I buy a 2015 Lincoln Navigator L?

Busy with my toddler and infant, wife is working today. Typed up the long winded post earlier while they were napping. Sorry for not replying earlier. Read all the replies and wanted to thank everyone for the earlier insightful contributions. I really appreciate you guys sharing some insights. As was pointing out creatively recently, safety is a huge priority. The input from you more experienced guys and gals is highly valued.

Thanks,

Dan