One drawback of this is that it stops the upload of files to iCloud. Right now I'm trying to upload a lot of stuff to iCloud because I'm trying out the system, to see if it is secure. I have used the Google alternative for years and though there are some things I like about it (you can see what's been happening to your files, in theory) in practice it seems to be very vulnerable to hacking.
I have been trying for several days to upload some files to iCloud so I have switched off 'sleep'. Nevertheless, almost every time I leave the computer when I return it has gone into sleep mode and stopped uploading.
When this happens I change my password and turn off 'sleep' again. At first I thought the hackers must be using my laptop camera to capture my password. But I put a sticking plaster over the camera and it still happened. I used plaster because I had observed when using the camera for a Zoom session, or some such thing, that even if you cover it with a label you still get a fuzzy image; possibly enough to capture a password. You can not see through plaster.
One of the frustrating things about this is that the Investigatory Powers Tribunal has actually registered my complaint, and I had some hope that I might get relief. Fat chance. Nothing stops these people.
Jonathan Brind