Transit in LI is nice if you're looking to get between towns and the city. For day-to-day stuff, a lot of those activities will still need a car.

If you want to get between towns without a car, have fucking fun. Great Neck to Roosevelt Field Mall? That's three buses and 1 hr 44 minutes by transit and 24 minutes by car. My partner's parents live a 10 minute drive from the grocery store and a 40 minute walk. This article pretends as if LI is equivalent to the more densly populated parts of Queens and Brooklyn.