I was very concerned about it last year, starting into the corporate job hunt at age 41, where I'd quit my last regular tech job at age 28, doing freelancing, startups (just coding, not as founder or anything), some long-term travel and misc piddling in the interim.

I had no problem at all. Got on site interviews at three of the "big four", some big industrials, some smaller companies, and a couple better-than-I-expected job offers. Maybe I got lucky or maybe it's typical, but that's my one point of reference.

The org I'm in, I'd say I'm slightly older than the others at my level, but not a ton. And it seems pretty fluid, I think within 2-3 years I'll "catch up" to the level I'd have been at if I'd not taken all that time off.