[Someone1234]

One laptop, but I VPN -> Remote Desktop into a work PC and keep work stuff isolated there. This works fine for development/Microsoft Office/etc. It may not work for all industries though.

The biggest downside is that it assumes a data connection, but given the development I'm typically involved in that is largely unavoidable regardless.

I do try to keep the Remote Desktop host clean of work files on purpose, in case it is lost, I quit, the machine dies, or I want to use a different machine on a whim. As long as I have my physical 2F key and a Cisco Anyconnect client I can work from any machine.