Okay, fair, there are some exclusives. But reading through these, wow, nothing of value is lost.

Most importantly because for the newest ones like AW2, they're just on a 1 year Early Access release in a lot of ways. Every time someone I know bought a game there, I was grateful they did the paid (as in, they pay, not get paid) bug testing work for the poor devs. And then once it releases on other stores, you can buy a somewhat patched-up version, and usually for 25%-50% off.