> But then again, email spam has been solved for the most part
Only if you use one of the big email providers or if you pay to route it via some antispam system. If you don't and play around with e.g. Postfix and spamassassin then you'll notice more than enough spam.
If you use Postfix and CRM114 (http://crm114.sourceforge.net/) you can achieve equivalent or better spam filtering than the "big email providers".
I get maybe 1 spam every six months that leaks through. I simply add it to the crm114 filter as "this should be spam" and then no spam again for another six months or so.
