Ah SCALE.
The question "but will it s c a l e?" amuses me so much I actually made it a T-Shirt:
but will it s c a l e ... > HypotheticalMegastructure | CafePress
I was a Java developer back in the day, and I remember when ASP.Net was the new kid on the block and it wouldn't scale.
Scale is irrelevant for most people.
If you are just starting out learning to program it is even more irrelevant. It's like saying to someone who wants to be a carpenter don't learn to use a saw because when you go to work on the Empire State Building the saw won't scale.
Also: scale issues are all architectural and nothing to do with a specific language.
Anyway, I'll shut up.