I heard it argued that Germany didn't have the raw resources and production capacity to go for quantity. Especially later in the war. So quality it was.
That's not true. They could have standardized on a few rugged platforms -- and in fact, some in Nazi Germany advocated for that -- but their industry and engineering were generally self-sabotaging and a mess.
Not really, the tanks were both inefficient to operate and inefficient to build (lack of standardization, constantly changing plans, have to redesign every single part..)