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Are there people with SSH running on their laptop at home who haven't set up port forwarding?

It's the first thing I do when setting up a new router.

I also like having a public IP on my desktop (and laptop) at work.

That would be me. I have openvpn setup everywhere, and I would hate to have a public IP on a computer on which I work. Sooner or later I would forget about adding some iptables for redis, database or dev applications that I'm running.

I mean in theory that would be just a few simple firewall rules that I wouldn't need to change, but on long enough time I would screw something up exposing myself, so the more layers the better.

There is a firewall between the work network and the outside world. You'd need to ask the sysadmin (me) to open a port.

Only a couple of developers use it, and only to run Apache or similar.

I used to, but ZetoTier[0] has made that a thing of the past. Now, no matter where I am or what sort of connection I have, it's like I have all my devices (and a few other people's) on a local LAN. I use it all the time to SSH into my laptop from my phone when I leave it someplace. I really can't recommend it highly enough.

[0]: https://www.zerotier.com

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