Linux

Yes. I have sensitive info in my PC (work credentials) and in the case of a break-in, last thing I want is to jeopardize my job.

I encrypt my home folder and Windows install just in case someone breaks into my house and steals my computer. Super annoying entering my password each boot though.

I encrypt my workstations and backups thereof on external devices. To protect against theft or a lazy state-level adversary

Depends. On external drives yes. On internal boot drive no. I had performance issues and thermal issues with it so stopped on boot drives.

I do, laptops and workstations.

It's just too easy not to, and there's almost no downsides to it. (I only need to reboot, once a month or two.)

Well, unless you consider the possibility of forgetting the password a downside, so for that reason I keep the password in a password manager.

In case my laptop was stolen, there would quite a couple fewer things to worry about. Especially things like client's data which could be under NDA's, etc...

I have no significant private data on my disks. They can be wiped whether encrypted or not if they're stolen. And I like that in theory if my pc explodes I can recover the data with only the drive.

I always encrypt my computer SSD as well as my external backup drive. I just wish that when installing a Linux distro and when selecting encryption that it would work with multiple drives

All my important files are on a NAS, so if someone steals my laptop, there's nothing of value there without being able to log in and mount the remote file systems

Yeah all my drives are encrypted with LUKS mostly because of home burglaries (bad area and whatnot). I still keep backups regardless on drives that are also encrypted

Yes. Encrypting your entire hard drive has basically been a tickbox in the Fedora installer for a long time now. No reason why I wouldn't do it. It's, easy, doesn't give me any problems and improves my devices security with defence-in-depth. No brainer.

Only encrypt the home partition, for the root partition it just unnecessarily slows down the system.

Also, I think, there could be different approaches instead of encryption. AFAIK, android doesn't use encryption underneath, but uses a semi-closed bootloader (which means, if you install a different OS, all user data gets wiped). I'm currently investigating the feasibility of such an approach in the long term.