[ricopags]

No it doesn't. Alt+space bring up the window system menu to restore/maximize/close?

Alt+f, a to save as?

Negative.

[vel0city]

Alt, f, a, p, saves as PNG, or j for jpeg, or o for other. Its changed slightly, but it is there.

Alt+space is still a shortcut, but it was repurposed.

You didn't "los[e] the ability to alt+letter all the things", they just slightly changed some of them.