It's fine to question whether the 2nd Amendment has outlived its usefulness as a means to ensure state security. It's fine to wonder whether we'd actually be safer in a country where gun ownership is not a fundamental right. But as far as what the law is, there can be no question that the constitution does provide for a personal right to bear arms.
Reasonable regulation is still possible, and in fact, necessary. In Mcdonald v. Chicago, the Supreme Court explicitly refused to remove all gun restrictions, recognizing that some - such as restrictions against felons and the mentally ill, and geographical restrictions - were constitutional. There is a reasonableness standard that, admittedly, has recently been interpreted to favor the individual right over the regulatory power of the States. But States nonetheless have absolute power to put reasonable restrictions on gun ownership, and, in fact, every states does restrict gun ownership to some extent.
If someone really wanted to ban all gun ownership, that person would need to amend the Constitution. No Supreme Court would ever go so far as to implicitly repeal a constitutional amendment, which is what they would have to do if they ever approved a complete ban on gun ownership. Recent cases may have expanded the 2nd Amendment, but there has never been serious doubt that the amendment provides at least some protection of the right of individuals to bear arms. But is anyone really arguing that guns should be totally outlawed. That's a pretty extreme position. I like to think that even the most rigorous 2nd Amendment defender would not (seriously) suggest that States cannot take any regulatory measures - even, say, to prevent violent felons from obtaining guns. And if one did, I doubt many would agree with that position. Likewise, even the most rigorous proponent of gun regulation would not (seriously) suggest that no one should be allowed to own any guns for any reason. And if one did, I doubt many would agree with that position either.