Is there a better alternative?

Yes. The RTX 3060 is about 8% faster and has the same list price, and the RX 6600 XT is over 20% faster for only $50 more.

　　

How long will it last?

The RX 6600 already struggles to maintain 60 fps in demanding titles like Red Dead Redemption 2 at 1080p. If you want to play the latest games with the settings turned up, the RX 6600 will start to feel underpowered within a couple of years. If you’re focused on esports and less demanding games, it will last for many years to come.

　　

Should you buy it?

At list price, yes, but understand that you’re buying the second-best option. The RTX 3060 already isn’t a great graphics card considering its price, but it’s still faster than the RX 6600. In an ideal world, I’d recommend picking up an RTX 3060 Ti. But that’s not possible for most people considering how expensive they are on the secondhand market.