Originally Posted by ruckzac

I'd have to call this "mostly true" actually.

Adding seats by increasing plane size doesn't impact seat comfort or legroom.

This is based on the notion that slimline seats are as comfortable as the bulkier older seats. This is debatable in that many slimline seats lack adjustable lumbar support, but I think it's a fairly reasonable claim.

Re-engineering galley to allow more room for seats doesn't reduce seat comfort/legroom.