I’ve had the same gmail address since it was first announced. It also gets email forwarded to it from another ancient email address that I used to self-host and that still gets occasional real mails. Most of the spam is addressed to that other address.

Just took a peek at my spam folder: 207 messages going back to March 18th, two false positives (both from mailing lists), but nothing critical. I think maybe I’ve seen one spam message across all my accounts in my inbox. Their filters benefit from a huge set of trainers on their data.

(As an aside, I would note that some newer addresses that I publish naked on some websites that I maintain get very little spam (14 messages between the two accounts in the same timeframe, most of which are from a single sender who decided that they should send me their press releases without any means of opting out.)