You mean the Casascius coins? Lots of those still out there unswept, they are legit.
They're legit and always will be. There are few others that sure as shit are not and were emptied.
I've always found it really weird the hall pass people gave physical coin creators when it came to the handling of private keys. They're just another anon prick. Just because they're gluing a private key to a lump of metal does not mean it magically spirits away their dodgy as fuck tendencies.
I don't know if physical BTC are still a big thing. Back in the day though, the price was significantly lower. It made sense to buy physical BTC as a collectors item when it was like $15.