I’ve been using hot corners for approximately 5 years I think. It works very well.

Just configure the top right corner to lock the computer (AFAIK it’s new in Mojave) or start the screensaver with an n-second delay for password prompt (configured separately under the screensaver tab). The delay is important because you will trigger it by mistake many times. The new lock option does not have a delay, which makes it a little less convenient.

Also if you have a Touch Bar Mac you can add a “lock” button to the Touch Bar. I mostly use that one and unlock with my watch when I come close.

Thanks for posting this. I have been missing the Cmd-Shift-Power ever since getting a TouchBar.

Yeah I'm very happy with that shortcut :) others mentioned a shortcut with Ctrl-Shift-Escape, to force it to sleep. But doesn't seem to work in my case (I'm often using my MacBook in clamshell mode).

Didn't know this, I was using an Alfred command instead. Thanks!

I was using some other workaround as well. The shortcut is new since Mojave! :)

I use Ctrl+Shift+Esc to put my screen to sleep (which locks it).

Whoops. I never actually look at the keyboard (too late to edit my comment). It's Ctrl+Shift+Power

Is this a default shortcut key?

yep

Hot corner it is for me.